I. Introduction

Falsification of public documents is a serious offense under Philippine criminal law because it attacks public faith, commercial reliability, and the integrity of official records. When the falsified documents involve promissory notes and real estate mortgages, the legal consequences become even more significant because such instruments often affect credit, ownership, encumbrances over land, banking transactions, and foreclosure proceedings.

A promissory note may appear to be a private commercial instrument, but it can become closely tied to public records when used as the principal obligation secured by a notarized real estate mortgage. A real estate mortgage, once notarized and registered, becomes a public document affecting real property. If falsified, it may expose the offender not only to criminal liability for falsification but also to related civil, land registration, banking, foreclosure, and evidentiary consequences.

This article discusses the Philippine legal framework on falsification of public documents involving promissory notes and real estate mortgages, including the nature of the documents, elements of the offense, common factual scenarios, defenses, evidentiary issues, penalties, civil effects, and practical remedies.

II. Governing Law

The primary law is the Revised Penal Code, particularly the provisions on falsification under Articles 171 and 172.

Article 171: Falsification by Public Officer, Employee, Notary, or Ecclesiastical Minister

Article 171 punishes a public officer, employee, notary public, or ecclesiastical minister who, taking advantage of official position, falsifies a document by committing any of the acts enumerated in the law.

The punishable acts include:

Counterfeiting or imitating handwriting, signature, or rubric;
Causing it to appear that persons participated in an act or proceeding when they did not;
Attributing to persons statements other than those they made;
Making untruthful statements in a narration of facts;
Altering true dates;
Making alteration or intercalation in a genuine document that changes its meaning;
Issuing in authenticated form a document purporting to be a copy of an original when no such original exists, or including statements contrary to the original;
Intercalating instruments or notes relative to the issuance of a document in a protocol, registry, or official book.

Article 172: Falsification by Private Individuals and Use of Falsified Documents

Article 172 punishes:

A private individual who commits falsification in a public, official, or commercial document by any of the acts in Article 171;
A person who falsifies a private document to the damage of another or with intent to cause damage;
A person who knowingly introduces in a judicial proceeding or uses a falsified document.

For promissory notes and real estate mortgages, Article 172 is often invoked when the accused is a private person, such as a lender, borrower, buyer, corporate officer, broker, spouse, attorney-in-fact, or other person involved in the transaction.

III. Public, Official, Commercial, and Private Documents

A proper understanding of falsification requires distinguishing the type of document involved.

A. Public Document

A public document is one acknowledged before a notary public or authorized officer, or one issued by a public officer in the performance of official duties. A notarized document is generally treated as a public document because notarization converts it from a private writing into one entitled to public faith and admissible in evidence without further proof of authenticity, subject to proper objections and contrary evidence.

A real estate mortgage is commonly executed in a notarized instrument. Once notarized, it is a public document. Once registered with the Registry of Deeds, it further becomes part of the public records affecting title to real property.

B. Official Document

An official document is issued by a public officer in the exercise of official functions. Examples include certificates of title, tax declarations, registry records, certifications, court orders, and government-issued documents.

A real estate mortgage itself is not necessarily an official document merely because it is registered, but the registry entries, annotations on title, certifications, and related records issued by government offices are official documents.

C. Commercial Document

A commercial document is a document used by merchants or in commercial transactions. Promissory notes, checks, bills of exchange, warehouse receipts, and other negotiable instruments may be commercial documents.

A promissory note is typically a commercial document when used in business, lending, financing, or credit transactions. Even if not notarized, falsification of a commercial document may be punished under Article 172 without the need to prove actual damage in the same way as falsification of private documents.

D. Private Document

A private document is one executed by private persons without notarization and not considered commercial or official. Falsification of a private document has additional requirements: damage or intent to cause damage must be shown.

IV. Promissory Notes in Philippine Law

A promissory note is a written promise by one person to pay another a sum certain in money, either on demand or at a fixed or determinable future time. Under negotiable instruments principles, a note may be negotiable if it contains the required formal elements, but it may also be non-negotiable while still binding as evidence of debt.

In falsification cases, promissory notes commonly appear in the following ways:

The borrower’s signature is allegedly forged;
The amount is altered after signing;
The date of execution or maturity is changed;
Interest rates, penalties, or payment terms are inserted without authority;
A blank signed paper is converted into a promissory note;
A note is fabricated to support a mortgage, foreclosure, collection case, or criminal complaint;
A corporate note is signed by someone without authority;
A deceased person is made to appear to have signed the note;
A person is made to appear as co-maker, surety, or guarantor without consent;
The note is used to justify the execution or foreclosure of a real estate mortgage.

A promissory note may be central to a falsification case even when the public document charged is the real estate mortgage, because the mortgage is merely an accessory contract securing the principal obligation.

V. Real Estate Mortgages in Philippine Law

A real estate mortgage is a contract by which immovable property is used as security for the fulfillment of an obligation. The mortgagor does not transfer ownership but creates a lien or encumbrance over the property. If the debtor defaults, the mortgagee may foreclose the mortgage, subject to legal requirements.

For a real estate mortgage to bind third persons, it must generally be registered with the Registry of Deeds. The mortgage is typically notarized, then presented for registration. Once annotated on the certificate of title, it becomes a public notice of encumbrance.

Because land titles are vital in Philippine property law, falsification involving mortgages is treated seriously. A forged mortgage may lead to wrongful annotation, unlawful foreclosure, cloud on title, loss of property, impairment of credit, or fraudulent transfer after auction.

VI. Nature of Falsification of Public Documents

Falsification of a public document is considered an offense against public faith. The primary injury is not merely private damage to a person but the violation of the public’s trust in documents that the law treats as reliable.

For this reason, in falsification of public, official, or commercial documents, damage or intent to cause damage is generally not essential. The law punishes the act because falsification itself creates the possibility of prejudice and undermines confidence in public records and commercial dealings.

In the context of a notarized real estate mortgage, the false appearance that a person borrowed money, signed a promissory note, consented to a mortgage, appeared before a notary, or encumbered land is enough to create legal danger. The falsified document may be used to annotate a lien, demand payment, foreclose property, or defeat ownership rights.

VII. Elements of Falsification of Public or Commercial Documents by a Private Individual

For a private individual charged under Article 172 in relation to Article 171, the prosecution generally must prove:

The offender is a private individual, or a public officer who did not take advantage of official position;
The offender committed any act of falsification enumerated in Article 171;
The falsification was committed in a public, official, or commercial document.

In cases involving promissory notes and real estate mortgages, the prosecution often focuses on one or more of the following acts:

Forging the debtor’s or mortgagor’s signature;
Making it appear that the mortgagor personally appeared before the notary;
Making it appear that the mortgagor executed the mortgage when he or she did not;
Inserting false loan amounts, property descriptions, dates, interest rates, or obligations;
Altering notarized documents after execution;
Using a falsified document in court, foreclosure, registration, or collection proceedings.

VIII. Common Forms of Falsification Involving Promissory Notes and Mortgages

A. Forged Signature of the Borrower or Mortgagor

The most common form is forgery of the signature of the alleged borrower on the promissory note or of the property owner on the mortgage.

Forgery may involve:

Simulated signature;
Traced signature;
Cut-and-paste reproduction;
Digital or scanned insertion;
Use of a previously signed blank document;
Unauthorized signing by another person;
Signature obtained through fraud and used for a different document.

In mortgage cases, forged signatures are especially serious because a person cannot validly mortgage property without consent. A forged real estate mortgage is generally void and cannot create a valid lien.

B. False Appearance Before a Notary Public

A real estate mortgage is often notarized. Falsification may occur when the document states that the mortgagor personally appeared before the notary, presented competent evidence of identity, and acknowledged the instrument as a free and voluntary act, when in truth the mortgagor never appeared.

This may give rise to liability not only for the private person who procured or used the notarization but also for the notary public if the notary knowingly notarized the document without personal appearance or without proper identification.

A false notarial acknowledgment may constitute falsification because it makes it appear that a person participated in an act or proceeding when he or she did not.

C. Fictitious Loan Secured by Mortgage

A falsified promissory note may be created to make it appear that a loan exists. The false loan may then be used as the principal obligation secured by a real estate mortgage.

This scheme may be used to:

Create a fake debt;
Justify an encumbrance on land;
Pressure the property owner into payment;
Support an extrajudicial foreclosure;
Defraud heirs, co-owners, spouses, corporations, or buyers.

If there is no genuine principal obligation, the mortgage has no valid basis. A mortgage is merely accessory; it cannot exist independently of a valid debt or obligation.

D. Alteration of Loan Amount

A borrower may admit signing a promissory note or mortgage but deny the amount appearing on the document. For example, a loan of ₱500,000 may allegedly be altered to ₱5,000,000.

Such alteration may constitute falsification if it changes the meaning or legal effect of the document. Material alterations usually include changes in amount, interest, maturity, property covered, parties, and payment obligations.

E. Insertion of Interest, Penalties, or Acceleration Clauses

Falsification may also occur when terms are inserted after signing, such as:

Interest rate;
Penalty charges;
Attorney’s fees;
Acceleration clauses;
Waiver of notice;
Authority to foreclose;
Additional collateral;
Confession of judgment-style language, where applicable.

The issue is whether the insertion was made without authority and whether it changed the meaning of the instrument.

F. Falsified Dates

Changing the date of execution, maturity, acknowledgment, notarization, or registration may be material. Dates affect prescription, default, priority of liens, enforceability, interest computation, and foreclosure rights.

False dating may be used to make a loan appear older, revive a stale obligation, defeat another creditor’s priority, avoid a legal deadline, or make a document appear executed before death, incapacity, marriage, sale, or adverse claim.

G. Use of a Deceased Person’s Signature

A particularly serious scenario occurs when a promissory note or mortgage appears to have been signed by a person who was already dead on the date of execution or notarization. This strongly suggests falsification, although the prosecution must still prove authorship, participation, or knowing use by the accused.

H. Mortgage by a Non-Owner

A person may execute a mortgage over land he or she does not own, or may pretend to be the owner. Depending on the facts, this may involve falsification, estafa, use of falsified documents, or civil nullity.

If the person merely mortgages property without authority but does not falsify signatures or public documents, the issue may be different. But if the owner’s signature, appearance, consent, or acknowledgment is fabricated, falsification becomes central.

I. Falsified Special Power of Attorney

Real estate mortgages are often signed through an attorney-in-fact. A falsified Special Power of Attorney may be used to authorize another person to mortgage property.

The Civil Code generally requires special authority to mortgage real property on behalf of another. If the SPA is forged or falsely notarized, the mortgage based on it is vulnerable to annulment and may support criminal charges for falsification.

J. Corporate Promissory Notes and Mortgages

When corporations are involved, falsification issues may include:

Fake board resolutions;
Unauthorized signatures of corporate officers;
Fabricated secretary’s certificates;
False corporate acknowledgments;
Forged promissory notes;
Mortgages executed without board approval;
Misrepresentation that a person is authorized to bind the corporation.

A corporation acts through its board and authorized officers. A mortgage over corporate property generally requires proper corporate authority. False documents showing such authority may constitute falsification.

K. Spousal Consent and Conjugal or Community Property

Where the mortgaged property forms part of the conjugal partnership or absolute community, spousal consent may be legally significant. Falsification may arise if one spouse’s signature is forged or if the document falsely states that both spouses appeared and consented.

A mortgage lacking required spousal consent may be void, voidable, or unenforceable depending on the applicable property regime and circumstances. If consent was forged, criminal liability may also arise.

IX. Falsification Through Notarization

Notarization is a frequent focal point in mortgage falsification cases.

A notarized document carries evidentiary weight because it is presumed to be regular and authentic. However, this presumption is not conclusive. It may be overcome by clear, convincing, and more than merely preponderant evidence.

A notarial acknowledgment generally certifies that:

The parties personally appeared before the notary;
They were identified through competent evidence of identity;
They acknowledged that the instrument was their free and voluntary act;
The notary entered the document in the notarial register.

Falsification may be committed if the acknowledgment is false. A notary who notarizes without personal appearance may be administratively liable and, depending on knowledge and participation, criminally liable.

A defective notarization may also reduce the document to the status of a private document. However, for criminal liability, the focus is not only on whether notarization was defective but whether there was a false narration of facts or false participation attributed to a person.

X. Article 171 Acts Most Relevant to Promissory Notes and Mortgages

A. Counterfeiting or Imitating Signature

This applies where the borrower’s, mortgagor’s, witness’s, corporate officer’s, spouse’s, or notary’s signature is forged.

The prosecution must show that the signature was not genuine and that the accused was responsible for the falsification or knowingly used the falsified document.

Mere variance in signatures is not always enough. Courts often consider handwriting analysis, testimony of the supposed signer, circumstances of execution, access to the document, benefit from the falsification, and possession or use of the document.

B. Causing It to Appear That Persons Participated When They Did Not

This is highly relevant to notarized mortgages. A document may state that the property owner signed, appeared, acknowledged, borrowed money, or consented to mortgage the property, even though the owner did not.

The false appearance of participation may exist even if the signature itself is not the only issue. For example, a person may have signed a blank paper, but not the completed mortgage; or may have signed one document but was made to appear to have signed another.

C. Attributing Statements Not Made

A promissory note or mortgage may falsely attribute statements to a person, such as acknowledgment of debt, promise to pay, waiver of rights, consent to foreclosure, admission of receipt of money, or agreement to interest and penalties.

D. Making Untruthful Statements in a Narration of Facts

This may apply where the document contains false factual recitals, such as:

The borrower received a specified amount;
The mortgagor appeared before the notary;
The parties executed the document on a certain date;
The loan was secured by a particular property;
A board resolution authorized the mortgage;
The property owner is single or married to a consenting spouse;
The signatory has authority as attorney-in-fact.

However, the false narration must generally involve a statement of fact, not merely a wrong legal conclusion or promise of future performance.

E. Altering True Dates

False dates in promissory notes and mortgages can be material because they affect maturity, default, prescription, lien priority, foreclosure timing, and registration.

F. Alteration or Intercalation Changing Meaning

This applies to insertions, deletions, overwriting, substitution of pages, or additions after signing or notarization, where the change affects the document’s meaning.

Examples include changing ₱100,000 to ₱1,000,000, adding a property description, inserting a mortgage clause, adding a co-maker, changing the maturity date, or substituting pages containing more burdensome terms.

XI. The Role of Intent

Falsification of public documents is generally punished because of the perversion of truth and violation of public faith. Criminal intent is often presumed from the commission of the falsifying act, especially where the document is public, official, or commercial.

However, the prosecution must still establish that the accused participated in the falsification or knowingly used the falsified document. A person cannot be convicted merely because he or she benefited from the falsified document if participation or knowledge is not proven beyond reasonable doubt.

Good faith may be a defense where the accused honestly believed in the authenticity or authority of the document. But good faith must be supported by facts, especially where the accused had reason to doubt the document’s genuineness.

XII. Authorship and Participation

In falsification cases, the identity of the falsifier is often the most contested issue.

The prosecution may prove authorship by direct evidence, such as testimony of a witness who saw the accused falsify the document. More commonly, authorship is proven by circumstantial evidence.

Relevant circumstances may include:

Possession of the falsified document;
Presentation of the document for notarization;
Registration with the Registry of Deeds;
Use in foreclosure or court proceedings;
Benefit derived from the falsification;
Prior access to genuine signatures;
Control over document preparation;
Inconsistent explanations;
Relationship with the notary, lender, broker, or registry personnel;
Receipt of loan proceeds;
Acts showing consciousness of guilt.

Mere possession or benefit is not automatically enough, but possession and use of a falsified document may give rise to an inference of authorship or knowledge when unexplained.

XIII. Use of Falsified Documents

Even if a person did not personally falsify the document, he or she may be liable for knowingly using it.

Use may occur when the falsified promissory note or mortgage is:

Submitted to a bank;
Filed with the Registry of Deeds;
Used in a foreclosure petition;
Attached to a complaint for collection;
Presented in court as evidence;
Used to demand payment;
Used to annotate an encumbrance;
Used to consolidate title after foreclosure;
Used to sell or transfer property;
Used to pressure the owner into settlement.

Knowledge is essential. The user of the document must know that the document is falsified. Knowledge may be proven by direct or circumstantial evidence.

XIV. Relationship Between Falsification and Estafa

Falsification involving promissory notes and mortgages may overlap with estafa under Article 315 of the Revised Penal Code.

Estafa may arise where falsified documents are used to defraud another, obtain money, acquire property, cause foreclosure, or induce a person or institution to part with funds.

Examples:

A person forges a property owner’s signature on a mortgage and obtains a loan from a lender;
A borrower uses a falsified title or mortgage to secure financing;
A lender fabricates a promissory note and mortgage to collect a nonexistent debt;
A broker uses fake authority to mortgage property;
A person sells foreclosed property based on a falsified mortgage.

Depending on the facts, falsification may be a separate offense or may be absorbed in, complexed with, or separately charged from estafa. The legal treatment depends on whether the falsification was a necessary means to commit estafa and how the Information is drafted.

XV. Complex Crime Considerations

Under Article 48 of the Revised Penal Code, a complex crime may exist when a single act constitutes two or more grave or less grave felonies, or when one offense is a necessary means for committing another.

Falsification may be complexed with estafa when the falsified document is the necessary means to defraud the victim. However, if the falsification and the fraud are separate and distinct acts, or if the falsified document is used multiple times for separate purposes, separate charges may be possible.

In mortgage fraud, prosecutors may consider whether the facts support:

Simple falsification;
Use of falsified document;
Estafa through falsification;
Separate estafa and falsification;
Other crimes such as perjury, use of false certificates, or violations of special laws.

The exact charge matters because it affects penalty, prescription, evidence, and civil liability.

XVI. Civil Effects of Falsified Promissory Notes and Mortgages

A. Voidness of Forged Documents

A forged promissory note or mortgage is generally void as to the person whose signature was forged. Forgery produces no consent. Without consent, there is no valid contract.

A forged real estate mortgage cannot validly burden the property of the true owner. It cannot create a legitimate lien because the owner did not agree to encumber the property.

B. Mortgage as an Accessory Contract

A real estate mortgage is accessory to a principal obligation. If the promissory note or loan obligation is fictitious, void, or nonexistent, the mortgage generally has no independent basis.

However, if the debt is genuine but certain mortgage terms were falsified, the court may distinguish between the enforceability of the debt and the validity of the mortgage.

C. Cancellation of Mortgage Annotation

If a falsified mortgage has been annotated on a certificate of title, the property owner may seek cancellation of the annotation through appropriate judicial proceedings or, in some cases, administrative remedies depending on the nature of the defect and the relief sought.

Where factual issues of forgery, fraud, or validity exist, a court action is usually necessary.

D. Injunction Against Foreclosure

If a mortgage is allegedly falsified, the property owner may seek injunctive relief to stop extrajudicial foreclosure. Courts generally require a showing of a clear right, material invasion of that right, urgent necessity, and absence of adequate remedy.

Because foreclosure can result in loss of property, courts may examine whether serious questions exist regarding the validity of the mortgage.

E. Annulment of Mortgage and Foreclosure Sale

If foreclosure has already occurred, the owner may seek annulment of the mortgage, foreclosure sale, certificate of sale, consolidation of ownership, or subsequent transfer, depending on the stage of the proceedings and parties involved.

F. Damages

Civil damages may include:

Actual damages;
Moral damages;
Exemplary damages;
Attorney’s fees;
Litigation expenses;
Interest;
Costs of suit.

The availability of damages depends on proof of loss, bad faith, fraud, malice, or other legal grounds.

XVII. Effect on Torrens Title

The Torrens system protects registered land titles, but it does not validate forged instruments. A forged deed or mortgage is generally a nullity and conveys no title or lien.

However, complications arise when property passes to an innocent purchaser or mortgagee for value. Philippine land registration law protects certain innocent purchasers dealing with registered land, but protection is not absolute. The rule depends on whether the instrument is void, whether the certificate of title is genuine, whether the buyer or mortgagee acted in good faith, and whether circumstances should have prompted further inquiry.

Banks and financing institutions are usually held to a higher standard of diligence than ordinary buyers because they are expected to investigate the property, the identity of borrowers, and the authority of signatories before accepting real estate collateral.

XVIII. Mortgagee in Good Faith

A mortgagee in good faith is one who accepts a mortgage without notice of any defect or infirmity and for value. But good faith is not presumed in all circumstances, especially for banks and sophisticated lenders.

Factors that may defeat good faith include:

Failure to verify identity of mortgagor;
Failure to inspect the property;
Failure to confirm possession;
Suspiciously low loan-to-value ratio;
Discrepancies in signatures;
Irregular notarization;
Reliance on brokers without verification;
Ignoring adverse claims or occupants;
Failure to verify marital status or spousal consent;
Failure to check authority of attorney-in-fact or corporate officer.

If the mortgagee is negligent, the mortgage may be invalidated despite registration.

XIX. Evidentiary Issues

A. Presumption of Regularity of Notarized Documents

A notarized document is generally presumed valid and regular. It is admissible without further proof of authenticity and is entitled to full faith and credit on its face.

However, this presumption may be overcome by strong evidence. In falsification cases, notarization does not cure forgery. If the signature or acknowledgment is shown to be false, the document loses its public character and evidentiary value.

B. Testimony of the Alleged Signatory

The testimony of the alleged borrower or mortgagor denying the signature is important but may not always be sufficient by itself. Courts usually examine it with other evidence, such as handwriting comparison, notarial records, identification documents, travel records, death certificates, medical records, and surrounding circumstances.

C. Handwriting Experts

Handwriting analysis may be used but is not always conclusive. Courts are not bound by expert opinions and may make their own comparison of signatures. Expert testimony is weighed together with other evidence.

D. Notarial Register

The notarial register is crucial. It may show whether the document was actually entered, who appeared, what identification was presented, and whether the notarial details match the document.

Irregularities include:

No entry in the notarial register;
Different document title in the register;
Missing signatures;
Incomplete identification details;
Incorrect dates;
Reused document numbers;
Notary not commissioned at the time;
Document notarized outside territorial jurisdiction;
Notary’s commission expired;
No competent evidence of identity.

Such irregularities may support both criminal and administrative liability.

E. Registry of Deeds Records

Registry records may show who presented the mortgage for registration, when it was registered, what title was affected, and what annotations were made.

These records may be used to trace participation and establish use of the falsified document.

F. Bank and Loan Records

If the mortgage secured a loan, relevant records include:

Loan application;
Credit investigation report;
Appraisal report;
Promissory note;
Disclosure statement;
Amortization schedule;
Check vouchers;
Deposit records;
Board approvals;
Collateral documents;
Foreclosure notices.

These may show whether the alleged borrower received proceeds or whether the loan was fictitious.

G. Proof of Non-Appearance

To prove that a party did not appear before the notary, evidence may include:

Travel records;
Employment attendance;
hospital records;
death certificate;
detention records;
testimony of witnesses;
CCTV or location records where available;
absence of competent ID in notarial records;
notary’s testimony;
inconsistencies in the acknowledgment.

H. Chain of Custody of Documents

Document custody may matter. The party who prepared, possessed, notarized, registered, or benefited from the document may be scrutinized. Original documents are especially important because alterations, ink differences, page substitutions, and impressions may not be visible on photocopies.

XX. Criminal Procedure

A. Filing of Complaint

A complaint for falsification may be filed before the prosecutor’s office for preliminary investigation. The complainant should attach documentary and testimonial evidence supporting the claim.

Common attachments include:

Copy of the promissory note;
Copy of the real estate mortgage;
Certified true copy of title;
Registry of Deeds certification;
Notarial register entries;
Affidavit of denial;
Specimen signatures;
Handwriting examination report, if available;
Proof of non-appearance;
Demand letters;
Foreclosure documents;
Relevant bank records;
Death certificate or travel documents, if applicable.

B. Preliminary Investigation

The prosecutor determines whether probable cause exists. Probable cause does not require proof beyond reasonable doubt; it requires sufficient ground to believe that a crime was committed and that the respondent is probably guilty.

C. Information

If probable cause is found, an Information is filed in court. The Information must allege the essential facts constituting the offense, including the type of document, the falsifying act, and the participation of the accused.

Defects in the Information may affect conviction, especially where the charge fails to specify the manner of falsification or the accused’s role.

D. Trial

At trial, the prosecution must prove guilt beyond reasonable doubt. The defense may attack the authenticity of evidence, authorship, knowledge, intent, notarization, chain of custody, or sufficiency of proof.

XXI. Prescription of Offense

Prescription depends on the penalty prescribed by law and the classification of the offense. Falsification of public documents is generally treated as a serious offense with a relatively long prescriptive period, but the exact period depends on the imposable penalty and applicable law.

Prescription issues may arise when the falsified mortgage was executed years before discovery. In some cases, the prescriptive period may be argued to run from discovery, especially where the falsification was concealed and could not reasonably have been known earlier. The facts matter greatly.

Relevant dates include:

Date of execution;
Date of notarization;
Date of registration;
Date of annotation;
Date of discovery;
Date of use in foreclosure or court;
Date of filing of complaint.

XXII. Penalties

The penalty for falsification depends on whether the offender is a public officer, private individual, or user of a falsified document, and whether the document is public, official, commercial, or private.

For private individuals falsifying public, official, or commercial documents under Article 172, the penalty is generally lower than that imposed on public officers under Article 171 but remains serious and may include imprisonment and fine.

If falsification is complexed with estafa, the penalty may be determined under the rules on complex crimes. If multiple documents are falsified, multiple counts may be charged depending on whether each document involved a separate criminal act.

XXIII. Liability of Notaries Public

A notary public performs a function impressed with public interest. Improper notarization may result in:

Criminal liability for falsification, if the notary knowingly participated;
Administrative liability before the Supreme Court;
Revocation of notarial commission;
Disqualification from reappointment as notary;
Suspension from practice of law, if the notary is a lawyer;
Civil liability, where damage is caused.

A notary who notarizes a mortgage without personal appearance, proper identification, or notarial register compliance violates notarial duties. Notarization is not a mere mechanical act; it requires verification of identity and voluntariness.

XXIV. Liability of Lawyers

A lawyer involved in preparing, notarizing, using, or defending falsified promissory notes or mortgages may face professional discipline if he or she knowingly participated in fraud or falsification.

Possible violations include dishonesty, deceit, unlawful conduct, and conduct prejudicial to the administration of justice. Lawyers must not knowingly offer false evidence, assist fraud, or misuse legal processes such as foreclosure or collection suits based on falsified documents.

XXV. Liability of Bank Officers, Brokers, and Agents

Bank officers, brokers, loan processors, real estate agents, and fixers may incur liability if they participate in falsification or knowingly use falsified documents.

Their liability depends on evidence of knowledge and participation. Mere processing may not be enough, but active involvement in obtaining fake signatures, arranging false notarization, submitting forged documents, or benefiting from proceeds may establish criminal responsibility.

XXVI. Defenses in Falsification Cases

A. Genuine Signature

The accused may argue that the signature is genuine and that the complainant is falsely denying execution to avoid payment or foreclosure.

Supporting evidence may include witnesses to signing, notarial records, photographs, video, bank disbursement records, checks received by the borrower, prior admissions, partial payments, or correspondence acknowledging the debt.

B. Authority to Sign

The accused may claim that the signature was authorized, such as through a special power of attorney, corporate authority, agency, or implied authority.

However, authority to sign another person’s name must be clearly established. Forging a signature and later claiming consent is risky unless supported by credible evidence.

C. Good Faith

Good faith may be raised by a person who used the document without knowing it was falsified. For example, a lender may claim reliance on notarized documents, IDs, title records, and representations of an agent.

Good faith is stronger where due diligence was performed. It is weaker where the circumstances were suspicious.

D. Lack of Participation

An accused may argue that even if the document was falsified, there is no proof that he or she falsified it, caused it to be falsified, or knowingly used it.

This is often a strong defense where the prosecution proves forgery but fails to connect the accused to the act.

E. Civil Dispute Only

The defense may argue that the dispute concerns loan validity, payment, interest, or contract interpretation, not falsification.

However, the existence of a civil case does not bar criminal prosecution if the facts show criminal falsification.

F. Consent to Blank Document

An accused may claim that the complainant signed a blank or incomplete document and authorized later completion.

This defense depends on proof of authority and whether the completed terms exceeded what was authorized.

G. Mistake or Clerical Error

Not all inaccuracies are criminal falsification. A typographical error, clerical mistake, or innocent discrepancy may not amount to falsification if there is no deliberate perversion of truth.

But a “clerical error” defense is weak when the false entry concerns a material term such as amount, identity, property, signature, date, or acknowledgment.

XXVII. Distinguishing Falsification from Breach of Contract

A borrower’s failure to pay a promissory note is not falsification. A lender’s insistence on payment under a disputed loan is not automatically falsification. A disagreement over interest computation is not necessarily criminal.

Falsification requires a deliberate false making, alteration, or misrepresentation in a document. It is not enough that one party later disputes the obligation.

Examples of civil disputes:

Borrower claims interest is excessive;
Parties disagree on maturity date interpretation;
Payments were not properly credited;
Mortgagee allegedly failed to release mortgage after payment;
Borrower claims loan has been restructured;
Parties dispute whether default occurred.

Examples suggesting falsification:

Borrower denies signing the note;
Owner denies appearing before notary;
Amount was changed after signing;
Mortgage was registered using forged documents;
SPA was fabricated;
Deceased person appears as signatory;
Notarial register has no corresponding entry;
Pages were substituted after signing.

XXVIII. Foreclosure Based on a Falsified Mortgage

A falsified mortgage may lead to extrajudicial or judicial foreclosure. The affected owner may challenge the foreclosure before, during, or after sale.

Possible remedies include:

Complaint for injunction;
Complaint for annulment of mortgage;
Complaint for cancellation of mortgage annotation;
Complaint for annulment of foreclosure sale;
Opposition to consolidation of ownership;
Notice of adverse claim;
Criminal complaint for falsification;
Administrative complaint against the notary;
Civil action for damages.

If the foreclosure sale has already occurred, urgency increases because redemption periods, consolidation, new titles, and third-party purchasers may complicate recovery.

XXIX. Use in Judicial Proceedings

A person who knowingly introduces a falsified promissory note or mortgage in court may incur liability for use of falsified documents. This may happen in:

Collection cases;
foreclosure proceedings;
ejectment cases after foreclosure;
annulment cases;
probate or estate proceedings;
corporate disputes;
land registration cases;
criminal proceedings.

The act of presenting the document as evidence may be independently punishable if knowledge of falsification is shown.

XXX. Forgery and Burden of Proof

Forgery cannot be presumed. It must be proved by clear, positive, and convincing evidence in civil cases, and beyond reasonable doubt in criminal cases.

A party alleging forgery must present more than suspicion. Courts generally require credible evidence showing that the signature or document is not genuine.

Useful proof includes:

Testimony of alleged signer;
Standard signatures from official IDs, banks, passports, or prior documents;
Expert handwriting report;
Medical incapacity;
Absence from the place of signing;
Death before execution;
Notarial irregularities;
Testimony of notary or witnesses;
Evidence of document custody and preparation;
Inconsistencies in the accused’s explanation.

XXXI. Red Flags in Promissory Notes and Real Estate Mortgages

Common warning signs include:

No original copy available;
Photocopy only;
Inconsistent signatures;
Different fonts or spacing;
Misaligned pages;
Unusual staple marks or page substitutions;
Blank spaces filled in different ink;
Borrower’s ID details missing;
No witnesses despite large transaction;
Notarial register unavailable;
Notary denies notarization;
Notary’s commission expired;
Document notarized in a place where parties were absent;
Mortgagor did not receive loan proceeds;
No bank trail for the loan;
Mortgage registered long after alleged execution;
Property owner unaware of mortgage until foreclosure;
Unusual interest or penalty terms;
SPA executed abroad but not consularized or apostilled where required;
Corporate mortgage without board approval.

XXXII. Practical Steps for a Property Owner Who Discovers a Suspected Falsified Mortgage

A property owner should promptly:

Obtain certified true copies of the title and mortgage documents;
Check annotations on the certificate of title;
Request certified copies from the Registry of Deeds;
Obtain the notarial register entry from the notary or clerk of court;
Secure copies of the promissory note and loan documents;
Preserve specimen signatures;
Gather proof of whereabouts on the date of execution;
Check whether loan proceeds were released and to whom;
Send appropriate notices or demands;
File a criminal complaint if evidence supports falsification;
Consider civil action to annul the mortgage and cancel annotation;
Seek injunction if foreclosure is imminent;
File an administrative complaint against the notary if warranted;
Record an adverse claim if legally appropriate;
Act quickly if foreclosure, auction, redemption, or consolidation is pending.

XXXIII. Practical Steps for a Lender or Mortgagee

A lender should reduce falsification risk by:

Requiring personal appearance of borrowers and mortgagors;
Verifying government-issued IDs;
Checking civil status and spousal consent;
Confirming ownership and possession of property;
Conducting title verification with the Registry of Deeds;
Inspecting the property;
Requiring original owner’s duplicate title;
Verifying authority of attorneys-in-fact;
Checking corporate approvals;
Releasing loan proceeds only to verified borrowers;
Keeping photographs, videos, or signing records when appropriate;
Ensuring proper notarization;
Keeping complete loan documentation;
Avoiding reliance solely on brokers or intermediaries;
Monitoring notarial and registration compliance.

Banks and institutional lenders must exercise greater diligence because courts often expect them to have systems for verification.

XXXIV. Administrative Remedies Against a Notary Public

A defective or fraudulent notarization may be reported through an administrative complaint. The complainant should present:

The notarized document;
Proof that the party did not appear;
Notarial register irregularities;
Certification that no entry exists;
Proof of expired commission, if applicable;
Evidence of forged signature;
Other supporting documents.

Administrative liability does not automatically establish criminal liability, but findings in one proceeding may influence or support another depending on evidence.

XXXV. Remedies Before the Registry of Deeds

The Registry of Deeds generally performs ministerial functions when documents are registrable on their face. If there is a serious dispute involving forgery or fraud, the Registry may not be the proper forum to resolve factual issues.

A party may seek:

Certified copies of registered documents;
Verification of entry numbers and annotations;
Registration of adverse claim, if legally proper;
Cancellation pursuant to court order;
Annotation of notices or pending litigation where allowed.

Cancellation of a mortgage annotation based on forgery usually requires judicial determination.

XXXVI. Interaction with Civil Code Principles

Several Civil Code principles are relevant:

Consent is essential to contracts;
Forged consent is no consent;
A mortgage is accessory to a principal obligation;
A person cannot give what he or she does not have;
Agency requires authority;
Special authority is required for acts of strict dominion, including mortgaging real property;
Fraud may vitiate consent;
Bad faith may give rise to damages;
Registration does not validate a void instrument.

These principles help determine the civil validity of the promissory note, mortgage, foreclosure, and subsequent transactions.

XXXVII. Interaction with Rules on Evidence

Key evidentiary rules include:

Public documents are admissible as evidence of their execution and authenticity;
Private documents generally require proof of due execution and authenticity;
Original documents are preferred under the best evidence rule;
Handwriting may be proved by witness familiarity, expert comparison, or court comparison;
Entries in official records may be admissible;
Presumptions may be rebutted by contrary evidence;
Fraud and forgery require strong proof.

In criminal cases, constitutional rights of the accused, presumption of innocence, and proof beyond reasonable doubt control.

XXXVIII. Multiple Documents and Multiple Counts

A transaction may involve several documents:

Promissory note;
Real estate mortgage;
Disclosure statement;
Deed of assignment;
Special power of attorney;
Secretary’s certificate;
Board resolution;
Affidavit of consent;
Notarial acknowledgment;
Registry forms;
Foreclosure petition;
Certificate of sale.

Each falsified document may potentially constitute a separate count if separately falsified. However, charging depends on prosecutorial assessment, whether acts are distinct, and whether one document merely implements the falsification in another.

XXXIX. Corporate and Partnership Settings

In business settings, falsification may involve internal authority documents. A corporate officer may execute a promissory note or mortgage without actual authority, then create or use a false board resolution to support the transaction.

Issues include:

Whether the board authorized the loan;
Whether the signatory had apparent authority;
Whether the secretary’s certificate is genuine;
Whether corporate seal or records were misused;
Whether the lender relied in good faith;
Whether proceeds went to the corporation or individual officer.

Civil liability may involve the corporation, officers, lenders, and third parties. Criminal liability remains personal and depends on participation and intent.

XL. Estate and Heirship Situations

Falsified mortgages often arise after a property owner dies. Heirs may discover that the deceased supposedly signed a promissory note, SPA, deed, or mortgage near or after death.

Important evidence includes:

Death certificate;
Medical records;
signatures before illness or death;
estate documents;
notarial records;
registry annotations;
witness testimony;
proof of possession of title;
loan disbursement records.

Heirs may file actions to annul the mortgage, cancel annotations, recover property, and prosecute falsification if evidence supports criminal liability.

XLI. Overseas Filipinos and Remote Execution

Filipinos abroad may be victims of falsified mortgages where their signatures appear on Philippine documents while they were outside the country.

Evidence may include:

Passport stamps;
Bureau of Immigration records;
employment records abroad;
consular records;
travel itineraries;
foreign residence documents;
overseas employment certificates;
remittance records.

If the person was abroad on the date of notarization in the Philippines, a document stating personal appearance before a Philippine notary is highly suspect.

XLII. Blank Signed Documents

A common factual defense or accusation involves blank signed documents.

A person may sign blank papers for convenience, trust, loan processing, corporate transactions, or family dealings. If another person fills in unauthorized terms, criminal falsification may arise if the completed document differs from the authority given.

However, the signer’s negligence in signing blank documents may affect civil remedies or credibility, though it does not necessarily excuse criminal falsification by another.

Courts will examine:

Why the blank document was signed;
Who had custody;
What authority was given;
Whether the completed terms were authorized;
Whether the signer received benefits;
Whether there were prior similar dealings.

XLIII. Photocopies, Scanned Copies, and Electronic Images

Falsification cases increasingly involve scanned signatures, digital insertion, and photocopied documents.

Issues include:

Whether the original exists;
Whether the signature was electronically copied;
Whether pages were replaced before scanning;
Whether the document was printed after digital manipulation;
Metadata, where available;
Chain of custody of electronic files;
Whether notarization was genuine.

The absence of an original can weaken a case, but it does not automatically defeat it if secondary evidence is admissible and credible.

XLIV. Falsification and E-Documents

Real estate mortgages affecting registered land are traditionally paper-based and notarized. However, electronic records may be relevant as supporting evidence, such as emails, scanned IDs, bank confirmations, electronic messages, and digital drafts.

Electronic evidence may help prove preparation, transmission, knowledge, consent, or lack thereof. Authentication of electronic evidence is important.

XLV. Falsification Versus Simulation

A simulated contract is one where parties make it appear that a contract exists when it does not, or disguise the true agreement. Simulation may be absolute or relative.

If both parties knowingly execute a simulated mortgage, the issue may be civil simulation, tax fraud, banking fraud, or other offense depending on purpose. If one party fabricates the participation of another, falsification is more direct.

XLVI. Falsification and Usurious or Unconscionable Loans

A promissory note or mortgage may be genuine but contain excessive interest or oppressive terms. Excessive interest alone is not falsification. Courts may reduce unconscionable interest or penalties, but that is distinct from criminal falsification.

However, if the interest rate was inserted after signing or falsely represented as agreed upon, falsification may arise.

XLVII. Falsification and Identity Theft

Mortgage falsification may involve identity theft, such as using another person’s name, ID, tax identification number, marital status, or title documents. This may overlap with other offenses depending on the acts committed.

Identity theft can support the falsification charge by showing how the false appearance of participation was created.

XLVIII. Effect of Settlement or Payment

Settlement of the debt or payment of money does not automatically extinguish criminal liability for falsification. Criminal offenses are prosecuted in the name of the People of the Philippines.

However, settlement may affect civil liability, willingness of complainants to pursue the case, or appreciation of certain circumstances. It does not erase the falsification if the offense has already been committed.

XLIX. Affidavit of Desistance

An affidavit of desistance by the complainant does not automatically result in dismissal. Courts and prosecutors may still proceed if evidence supports the charge. This is especially true for falsification of public documents because the offense affects public faith, not merely private interest.

L. Practical Charging Issues

When drafting or evaluating a complaint, the following should be clear:

Which document was falsified;
Whether it is public, official, commercial, or private;
What specific false entry or act was committed;
Who committed it;
How the accused participated;
When and where the falsification occurred;
How the document was used;
What evidence proves falsity;
What evidence links the accused to the falsification;
Whether related offenses such as estafa are present.

A complaint that merely says “the mortgage is fake” without explaining the falsifying acts may be weak. Specificity is important.

LI. Sample Factual Patterns

A. Forged Mortgage to Secure Fake Loan

A landowner discovers that a mortgage was annotated on the title. The mortgage secures a promissory note allegedly signed by the landowner. The landowner denies signing both documents and proves being abroad on the date of notarization. The notarial register has no valid entry. This may support falsification of public and commercial documents, use of falsified documents, and civil annulment of mortgage.

B. Genuine Loan, Altered Amount

A borrower signs a note for ₱300,000. Later, the lender produces a notarized mortgage and note showing ₱3,000,000. The borrower received only ₱300,000 and the amount appears altered. The issue is whether the amount was changed without authority. This may support falsification if proven.

C. Unauthorized SPA

An elderly owner allegedly signs an SPA authorizing a nephew to mortgage land. The owner denies signing and medical records show incapacity. The nephew obtains a loan and signs a mortgage. If the SPA is forged, the mortgage may be void and the nephew may face falsification and estafa charges.

D. Corporate Mortgage Without Board Approval

A corporate officer signs a promissory note and mortgage over corporate land, attaching a secretary’s certificate showing board approval. The board denies issuing the resolution. If the certificate was fabricated, falsification may arise. The lender’s good faith depends on diligence.

E. False Notarial Acknowledgment

The mortgagor admits signing a document but says it was never acknowledged before a notary. The notarial acknowledgment states personal appearance. If the notary notarized without appearance, the notary may face administrative and possibly criminal liability. The document’s evidentiary status may be impaired.

LII. Key Legal Principles

A notarized real estate mortgage is a public document.
A promissory note may be a commercial document.
Falsification of public or commercial documents does not generally require proof of actual damage.
Forgery cannot be presumed; it must be proven.
A forged mortgage is generally void.
A mortgage is accessory to a valid principal obligation.
Registration does not cure a forged mortgage.
Notarization creates a presumption of regularity but does not validate falsity.
A notary must require personal appearance and proper identification.
Use of a falsified document may be punishable even if the user did not personally falsify it.
Good faith is a defense only when credible and supported by diligence.
Banks and lenders are expected to exercise heightened care.
Civil, criminal, administrative, and land registration remedies may proceed separately depending on the facts.
Settlement does not automatically extinguish criminal liability.
The prosecution must prove guilt beyond reasonable doubt.

LIII. Conclusion

Falsification of public documents involving promissory notes and real estate mortgages sits at the intersection of criminal law, property law, commercial law, evidence, notarial practice, and land registration. The offense is grave because it does not merely harm an individual borrower or landowner; it undermines public confidence in notarized documents, registered land records, credit transactions, and judicial proceedings.

In Philippine law, a promissory note may serve as the principal evidence of debt, while a real estate mortgage may create a registered encumbrance over land. If either is falsified, the consequences can include criminal prosecution, annulment of mortgage, cancellation of title annotations, injunction against foreclosure, damages, administrative sanctions against a notary, and possible liability for related offenses such as estafa.

The central questions are usually factual: Was the signature genuine? Did the person appear before the notary? Was the debt real? Were the terms altered? Who prepared, possessed, registered, or used the document? Did the accused know of the falsification? The answers determine whether the matter is merely a civil dispute over debt or a criminal falsification affecting public faith.