A Philippine Legal Article

I. Introduction

In the Philippine criminal justice system, the filing and investigation of a criminal complaint often begin before a prosecutor, law enforcement agency, or specialized investigative body. One of the most frequently encountered agencies in this process is the National Bureau of Investigation, commonly known as the NBI.

The NBI is often approached for complaints involving cybercrime, fraud, estafa, falsification, threats, identity theft, online scams, public corruption, document-related offenses, violence, and other crimes requiring investigative assistance. During an NBI investigation, two documents commonly become important: the subpoena and the affidavit.

A subpoena compels a person to appear, produce documents, or both. An affidavit, on the other hand, is the written sworn statement that usually forms the backbone of a criminal complaint. Together, they play a major role in determining whether a complaint proceeds to preliminary investigation, inquest, further evidence-gathering, or dismissal.

This article discusses the Philippine legal context of NBI subpoenas and affidavit requirements in criminal complaints, including their purpose, legal effect, contents, practical implications, and common issues.

II. The Role of the NBI in Criminal Complaints

The NBI is an investigative agency under the Department of Justice. It is not a court. It does not convict, acquit, or impose criminal penalties. Its function is primarily investigative.

In criminal matters, the NBI may:

receive complaints;
evaluate initial evidence;
summon parties or witnesses;
gather documents, digital evidence, records, and statements;
conduct interviews;
prepare investigative reports;
recommend prosecution;
endorse matters to the Office of the Prosecutor; and
assist prosecutors or courts when directed.

A complaint filed with the NBI is not always the same as a criminal case already filed in court. In many instances, it is still in the fact-finding or case build-up stage. The purpose is to determine whether there is enough basis to refer the matter to the prosecutor for preliminary investigation or further legal action.

III. What Is an NBI Subpoena?

An NBI subpoena is a formal written notice issued by the NBI directing a person to appear before an NBI officer or division, usually in connection with a pending complaint or investigation.

It may require the recipient to:

appear personally at the NBI;
give a statement;
submit a counter-affidavit;
produce documents;
bring records, devices, or other evidence;
identify persons involved;
clarify facts; or
cooperate in the investigation.

A subpoena may be addressed to a respondent, complainant, witness, company officer, custodian of records, bank representative, platform representative, employer, public officer, or another person who may have information relevant to the complaint.

IV. Common Types of Subpoena

In Philippine legal practice, subpoenas are generally understood in two main forms:

A. Subpoena ad testificandum

This requires a person to appear and testify or give a statement.

In the NBI context, it may require a person to attend an investigation conference or appear before an investigator to answer questions or submit a sworn statement.

B. Subpoena duces tecum

This requires a person to produce documents, records, things, or other evidence.

Examples include:

transaction receipts;
contracts;
chat logs;
screenshots;
CCTV recordings;
bank documents;
corporate records;
identification records;
employment records;
device logs;
IP address information;
account registration details; and
communications relevant to the complaint.

Sometimes, a subpoena may combine both requirements: appearance and production of documents.

V. Legal Nature of an NBI Subpoena

An NBI subpoena is not a judgment, warrant of arrest, or finding of guilt. Receiving one does not mean a person has already been charged in court or convicted of a crime.

It usually means that:

a complaint or investigative request has been filed;
the NBI is gathering facts;
the recipient may have relevant information;
the recipient may be a respondent, witness, or records custodian; or
the NBI wants the recipient’s side before taking further action.

A subpoena should be treated seriously because it is an official process. Ignoring it may expose the recipient to legal complications, especially if the subpoena was validly issued and properly served.

VI. Who May Receive an NBI Subpoena?

A subpoena may be issued to several categories of persons.

A. Respondent

A respondent is the person being complained against. The subpoena may require the respondent to submit a counter-affidavit or appear to explain their side.

B. Complainant

A complainant may be required to clarify allegations, submit additional evidence, or execute a supplemental affidavit.

C. Witness

A witness may be summoned if they possess relevant information.

D. Custodian of records

A company, agency, bank, employer, school, platform, telecommunications provider, or government office may receive a subpoena for documents.

E. Corporate officer or representative

Where the complaint involves a corporation, online platform, business entity, employer, or institution, the NBI may summon an authorized representative.

VII. Contents of an NBI Subpoena

An NBI subpoena commonly contains:

the name of the NBI office, division, or unit;
the name of the person summoned;
the case title or reference number, if any;
the nature of the complaint or investigation;
the date, time, and place of appearance;
the name of the assigned investigator or agent;
the documents or items required to be produced;
instructions on submission of affidavits or counter-affidavits;
warning regarding non-compliance; and
the signature of the issuing officer or authorized official.

Some subpoenas are brief. Others contain more detailed instructions, especially in cybercrime, financial fraud, corporate, or document-related complaints.

VIII. Service of NBI Subpoena

A subpoena must generally be brought to the attention of the person or entity concerned. Service may be done personally, through authorized representatives, by delivery to an office address, or through other means recognized in practice.

In modern investigations, notices may also be communicated through email or electronic means, especially when parties have already appeared, submitted contact details, or consented to electronic communication. However, formal service remains important when enforcement or non-compliance becomes an issue.

The recipient should verify:

whether the subpoena is authentic;
which NBI office issued it;
who the assigned investigator is;
the exact date and time of appearance;
whether documents are required;
whether appearance is mandatory;
whether counsel may accompany the recipient; and
whether a written explanation or affidavit is expected.

IX. Must a Person Comply with an NBI Subpoena?

As a general rule, a person who receives a valid subpoena from an authorized investigative body should comply or respond appropriately.

Compliance does not always mean giving every statement requested. A recipient has rights, including the right to counsel, the right against self-incrimination, and the right to refuse improper or overly broad demands. However, ignoring the subpoena without legal basis is usually unwise.

A proper response may include:

appearing on the scheduled date;
requesting resetting for valid reasons;
submitting documents;
submitting a written explanation;
submitting a counter-affidavit;
appearing through counsel where allowed;
objecting to improper requests;
seeking clarification from the investigator; or
filing the appropriate legal remedy if the subpoena is believed to be invalid or abusive.

X. Consequences of Ignoring an NBI Subpoena

Ignoring an NBI subpoena may have consequences depending on the circumstances.

Possible consequences include:

the investigation proceeding without the recipient’s side;
adverse practical inference by the investigator;
recommendation for filing of a criminal complaint based only on available evidence;
issuance of another subpoena or notice;
referral to the prosecutor;
possible contempt-related or obstruction-related issues in appropriate cases; or
loss of opportunity to clarify facts early.

It is important to distinguish between failure to appear and admission of guilt. Failure to appear is not automatically an admission of guilt. But it may deprive the person of a chance to present their side at an early stage.

XI. Right to Counsel During NBI Proceedings

A person summoned by the NBI may be accompanied by counsel. This is especially important if the person is a respondent or if the matter involves potential criminal liability.

Counsel may assist by:

verifying the subpoena;
communicating with the investigator;
preparing a counter-affidavit;
reviewing evidence;
advising on whether to answer certain questions;
asserting the right against self-incrimination;
ensuring that statements are voluntary;
objecting to improper questioning;
requesting copies of the complaint and attachments; and
helping avoid damaging or inaccurate statements.

A respondent should avoid making casual admissions, verbal explanations, or written statements without understanding the legal implications.

XII. Right Against Self-Incrimination

The Constitution protects a person from being compelled to be a witness against themselves.

In practical terms, a respondent should be careful when asked to:

explain alleged participation in an offense;
authenticate documents that may incriminate them;
disclose passwords;
surrender devices;
identify conversations;
admit ownership of accounts;
sign statements;
make handwritten explanations; or
answer questions without counsel.

The right against self-incrimination does not necessarily allow a person to disregard every investigative process. But it protects against compelled testimonial self-incrimination. The scope of the right may depend on the nature of the evidence demanded and the circumstances of the investigation.

XIII. NBI Subpoena Versus Prosecutor’s Subpoena

An NBI subpoena and a prosecutor’s subpoena are related but distinct.

A. NBI subpoena

This is usually part of fact-finding or case build-up. The NBI investigates and may recommend prosecution.

B. Prosecutor’s subpoena

This is usually issued in a preliminary investigation. The prosecutor determines whether there is probable cause to charge a person in court.

A prosecutor’s subpoena often requires the respondent to submit a counter-affidavit and supporting evidence. Failure to submit a counter-affidavit may result in the complaint being resolved based on the complainant’s evidence.

In practice, a case may begin with the NBI, then move to the prosecutor after the NBI completes its investigation.

XIV. NBI Investigation Versus Preliminary Investigation

A key distinction must be understood.

A. NBI investigation

The NBI gathers facts and evidence. It may invite, summon, interview, and receive affidavits. It does not finally determine guilt.

B. Preliminary investigation

A prosecutor determines whether there is probable cause to believe that a crime has been committed and that the respondent is probably guilty and should be held for trial.

The NBI may file or endorse a complaint with the prosecutor, but it is the prosecutor who usually conducts preliminary investigation for offenses requiring it.

XV. The Role of Affidavits in Criminal Complaints

An affidavit is one of the most important documents in a criminal complaint. It is a written statement made under oath before a person authorized to administer oaths, such as a notary public or authorized prosecutor/investigating officer.

In criminal complaints, affidavits are used to establish:

the identity of the complainant;
the identity of the respondent;
the facts constituting the offense;
the time, date, and place of the incident;
how the complainant knows the facts;
the evidence supporting the allegations;
the participation of each respondent;
the damage or injury caused;
the witnesses involved; and
the legal basis for further investigation or prosecution.

A criminal complaint often succeeds or fails at the preliminary stage based on the clarity, consistency, and sufficiency of the affidavits submitted.

XVI. Types of Affidavits Commonly Used

A. Complaint-affidavit

This is the complainant’s main sworn statement. It narrates the facts and accuses the respondent of committing a crime.

B. Witness affidavit

This is executed by a person who personally saw, heard, received, handled, verified, or otherwise has personal knowledge of relevant facts.

C. Supplemental affidavit

This adds details, clarifies earlier statements, or attaches newly discovered evidence.

D. Counter-affidavit

This is the respondent’s sworn answer to the complaint. It denies, explains, justifies, or contextualizes the allegations.

E. Reply-affidavit

This may be filed by the complainant to respond to the counter-affidavit, if allowed by the prosecutor or investigator.

F. Rejoinder-affidavit

This may be filed by the respondent to answer the reply-affidavit, when allowed.

G. Affidavit of desistance

This is a complainant’s statement that they no longer wish to pursue the complaint. It does not always automatically result in dismissal, especially for public crimes, but it may affect evaluation of the case.

H. Affidavit of loss

This may be relevant in cases involving lost documents, identification cards, receipts, certificates, or negotiable instruments.

I. Affidavit of attestation or certification

This may be used by custodians of records, company officers, IT personnel, or public officers to authenticate records.

XVII. Basic Requirements of a Complaint-Affidavit

A complaint-affidavit should generally contain the following:

1. Title or caption

The affidavit should identify the parties and the nature of the complaint.

Example:

Complaint-Affidavit for Estafa Juan Dela Cruz, Complainant versus Pedro Santos, Respondent

2. Personal circumstances of the affiant

The affidavit should state the complainant’s name, age, nationality, civil status, address, and sometimes occupation.

3. Capacity to execute the affidavit

The affiant should state that they are the complainant or witness and that they have personal knowledge of the facts.

4. Clear narration of facts

The facts should be arranged chronologically and logically.

5. Identification of the respondent

The affidavit should identify the person complained against. If the full name is unknown, aliases, usernames, account names, phone numbers, email addresses, photos, addresses, or other identifying details may be included.

6. Specific acts complained of

The affidavit should state what the respondent did or failed to do.

7. Date, time, and place

These details help establish jurisdiction, prescription, credibility, and elements of the offense.

8. Elements of the offense

The facts should support the legal elements of the crime being alleged.

9. Evidence attached

The affidavit should refer to annexes, such as screenshots, receipts, contracts, photos, medical certificates, police blotters, demand letters, or official records.

10. Statement of truth

The affidavit should state that the facts are true and correct based on personal knowledge or authentic records.

11. Oath and notarization

The affidavit must be sworn before an authorized officer.

XVIII. Importance of Personal Knowledge

Affidavits should be based on personal knowledge, not rumor, speculation, or hearsay.

A complainant should avoid statements like:

“I heard that the respondent did this.”
“Someone told me that he is guilty.”
“I believe he is part of a syndicate.”
“It is obvious that she intended to defraud me.”

Instead, the affidavit should state facts:

“On 5 March 2026, I transferred ₱25,000 to the bank account provided by the respondent.”
“Attached as Annex A is a screenshot of our conversation.”
“The respondent promised delivery by 10 March 2026 but failed to deliver.”
“I sent a demand letter on 15 March 2026, but the respondent did not respond.”

Opinions and conclusions are weaker than specific facts.

XIX. Affidavits and the Elements of the Crime

A criminal complaint must do more than express anger or suspicion. It must allege facts showing that a crime was probably committed.

For example:

A. Estafa

The affidavit should generally show deceit, reliance, damage, and the respondent’s participation.

B. Theft

The affidavit should show taking of personal property, lack of consent, intent to gain, and ownership or possession.

C. Cyberlibel

The affidavit should show publication through a computer system or similar means, identification of the complainant, defamatory imputation, malice or circumstances showing it, and injury or reputational harm.

D. Threats

The affidavit should state the exact threatening words, context, date, medium, identity of sender, and effect on the complainant.

E. Falsification

The affidavit should identify the document, the false entry or alteration, who made or used it, how it is false, and its legal significance.

F. Violence against women and children

The affidavit should narrate the relationship, acts of abuse, dates, injuries, psychological or economic harm, witnesses, and supporting records.

G. Bouncing checks

The affidavit should identify the check, amount, date, dishonor, notice of dishonor, and failure to pay within the required period.

The affidavit should be tailored to the specific offense. A generic affidavit may be insufficient.

XX. Annexes and Supporting Documents

Supporting documents are often essential. A strong affidavit usually refers to annexes in an organized way.

Common annexes include:

screenshots;
chat logs;
emails;
text messages;
call logs;
photos;
videos;
receipts;
deposit slips;
bank transfer confirmations;
contracts;
invoices;
official receipts;
demand letters;
proof of mailing or delivery;
medical certificates;
barangay blotters;
police blotters;
corporate documents;
government IDs;
certification from platforms or service providers;
affidavits of witnesses;
expert reports;
forensic reports; and
chain-of-custody documents.

Each annex should be marked clearly, such as Annex “A,” Annex “B,” Annex “C,” and so on.

XXI. Screenshots and Digital Evidence

Many NBI complaints involve online conduct. Screenshots are commonly submitted, but screenshots alone may not always be enough.

For digital evidence, the complainant should consider preserving:

original URLs;
usernames and account links;
timestamps;
full conversation threads;
device information;
transaction reference numbers;
email headers, where relevant;
metadata, where available;
platform notices;
account registration details, if legally obtainable;
backup files;
downloaded copies; and
notarized or certified printouts, where appropriate.

Screenshots should not be cropped in a misleading way. They should show context, dates, sender identity, and continuity of conversation.

XXII. Chain of Custody and Integrity of Evidence

Where physical or digital evidence is involved, integrity matters.

The affidavit should explain:

who obtained the evidence;
when it was obtained;
where it came from;
whether it was altered;
how it was stored;
who had access to it; and
how it connects to the respondent.

In cybercrime or electronic evidence cases, a weak chain of custody may allow the respondent to challenge authenticity, reliability, or admissibility.

XXIII. Counter-Affidavit Requirements

A respondent who receives a subpoena requiring a counter-affidavit should prepare carefully. The counter-affidavit is not merely a denial. It is the respondent’s opportunity to present facts, defenses, documents, witnesses, and legal objections.

A counter-affidavit should generally include:

respondent’s personal circumstances;
denial or admission of specific allegations;
chronological narration of the respondent’s version;
explanation of documents or communications;
defenses;
supporting evidence;
affidavits of witnesses;
objections to complainant’s evidence;
legal grounds for dismissal; and
prayer for dismissal or other appropriate relief.

General denials are usually weak. Specific factual rebuttals are stronger.

XXIV. Common Defenses Raised in Counter-Affidavits

Depending on the offense, respondents may raise:

lack of probable cause;
lack of criminal intent;
absence of deceit;
absence of damage;
payment or settlement;
mistaken identity;
account hacking or unauthorized use;
lack of participation;
civil nature of the dispute;
lack of jurisdiction;
prescription;
violation of due process;
inadmissibility or unreliability of evidence;
privileged communication;
truth and fair comment in defamation-related matters;
lack of notice or demand, where required;
authority to act;
consent of the complainant;
self-defense or defense of relatives, where applicable;
alibi, where properly supported; and
malicious or retaliatory filing.

The defense should match the facts and the specific crime alleged.

XXV. Verification, Oath, and Notarization

Affidavits must be sworn. A notarized affidavit carries legal significance because the affiant declares under oath that the contents are true.

The affiant should personally appear before the notary or authorized officer and present competent proof of identity.

A defective notarization may weaken the affidavit. In some cases, it may lead to objections or require re-execution.

The affiant should not sign a blank affidavit. The affiant should read and understand the affidavit before signing.

XXVI. Language of the Affidavit

Affidavits may be written in English or Filipino. In some cases, the language used may depend on the preference of the affiant, investigator, prosecutor, or counsel.

The important point is that the affiant must understand the affidavit. If the affidavit is in English but the affiant does not understand English well, this may later be questioned.

For witnesses more comfortable in Filipino or another Philippine language, the affidavit may be prepared in that language or translated properly.

XXVII. Format of a Complaint-Affidavit

A complaint-affidavit commonly follows this structure:

caption;
introductory statement of identity;
statement of personal knowledge;
narration of facts;
identification of evidence;
statement of offense or complaint;
statement of damages or injury;
request for investigation/prosecution;
affirmation of truth;
signature of affiant;
jurat or oath portion;
notarial details or administering officer’s certification; and
annexes.

A well-organized affidavit helps the investigator or prosecutor understand the case quickly.

XXVIII. Sample Structure of a Complaint-Affidavit

Below is a general structure, not a substitute for legal drafting tailored to the facts.

Complaint-Affidavit

I, [Name], of legal age, Filipino, [civil status], and residing at [address], after being duly sworn, state:

I am the complainant in this case and I have personal knowledge of the facts stated in this affidavit.
On [date], [describe first material event].
On [date], [describe next material event].
Respondent [name], whose address is [address if known], did the following acts: [specific acts].
As a result, I suffered [damage, injury, loss, fear, reputational harm, etc.].
Attached as Annex “A” is [description]. Attached as Annex “B” is [description].
I am executing this affidavit to attest to the truth of the foregoing and to support the filing of a criminal complaint for [offense], and such other offenses as may be warranted by the evidence.

IN WITNESS WHEREOF, I have signed this affidavit on [date] at [place].

[Signature] [Name of Affiant]

Subscribed and sworn to before me this [date] at [place], affiant exhibiting competent proof of identity.

XXIX. Sample Structure of a Counter-Affidavit

Counter-Affidavit

I, [Name], of legal age, Filipino, [civil status], and residing at [address], after being duly sworn, state:

I am the respondent in the complaint filed by [complainant].
I deny the allegations against me because they are false, incomplete, misleading, or unsupported by evidence.
The true facts are as follows: [chronological narration].
As to paragraph [number] of the complaint-affidavit, [specific admission, denial, or explanation].
The documents attached by complainant do not prove the alleged offense because [explanation].
Attached as Annex “1” is [respondent’s evidence].
The complaint should be dismissed for lack of probable cause.

IN WITNESS WHEREOF, I have signed this affidavit on [date] at [place].

[Signature] [Name of Respondent]

Subscribed and sworn to before me this [date] at [place], affiant exhibiting competent proof of identity.

XXX. Common Mistakes in Complaint-Affidavits

Complainants often weaken their own cases by committing avoidable mistakes.

Common mistakes include:

making vague allegations;
failing to identify the respondent;
failing to state dates and places;
attaching unclear screenshots;
failing to connect the respondent to the account or act;
relying on hearsay;
exaggerating facts;
omitting material context;
mixing civil claims with criminal accusations without explaining criminal elements;
failing to attach proof of damage;
failing to prove demand or notice where required;
submitting inconsistent statements;
failing to authenticate documents;
using emotional language instead of facts;
filing against too many respondents without specific acts; and
failing to preserve original evidence.

A criminal complaint must be factual, coherent, and supported.

XXXI. Common Mistakes in Counter-Affidavits

Respondents also make mistakes, such as:

ignoring the subpoena;
submitting a bare denial;
giving unnecessary admissions;
attacking the complainant personally instead of addressing facts;
submitting fabricated or altered evidence;
failing to attach supporting documents;
failing to explain suspicious communications;
admitting ownership of accounts or transactions without legal advice;
failing to raise jurisdictional or procedural defenses;
missing deadlines;
submitting unsigned or unsworn statements;
relying on verbal explanations only; and
failing to consult counsel in serious cases.

A counter-affidavit should be deliberate, precise, and evidence-based.

XXXII. Deadlines for Submission

The deadline to submit an affidavit or counter-affidavit depends on the subpoena, investigator’s instructions, prosecutor’s order, applicable rules, or nature of the proceeding.

A recipient should check:

the stated date of appearance;
whether the affidavit must be submitted before or during appearance;
whether extensions are allowed;
whether counsel must file a written request;
whether electronic submission is accepted;
whether hard copies are required; and
how many copies must be filed.

Missing a deadline may cause the matter to proceed without the party’s evidence.

XXXIII. Requesting Postponement or Extension

A person who cannot attend or submit on time should not simply ignore the subpoena. A written request for postponement or extension may be submitted.

Valid reasons may include:

illness;
prior court hearing;
lack of time to secure counsel;
need to obtain documents;
travel;
emergency;
improper or late service;
need to review complaint attachments; or
other legitimate grounds.

The request should be respectful, specific, and filed before the scheduled date whenever possible.

XXXIV. Settlement and Affidavit of Desistance

Some complaints are settled during investigation. Settlement may involve payment, apology, return of property, correction of records, takedown of posts, or execution of compromise documents.

An affidavit of desistance may be executed by the complainant stating that they are no longer interested in pursuing the complaint. However, in Philippine criminal law, crimes are generally offenses against the State. Therefore, desistance does not always automatically terminate the case.

Its effect depends on:

the nature of the offense;
whether the crime is public or private in character;
the stage of proceedings;
the strength of independent evidence;
whether the desistance appears voluntary;
whether public interest is involved; and
the discretion of the prosecutor or court.

For serious offenses, prosecutors may proceed despite desistance.

XXXV. Barangay Conciliation and Criminal Complaints

Some disputes may require barangay conciliation before court action, especially disputes between individuals residing in the same city or municipality and involving offenses punishable within the limits covered by the Katarungang Pambarangay system.

However, many criminal complaints handled by the NBI may be outside barangay conciliation because of:

seriousness of the offense;
penalty involved;
parties residing in different cities or municipalities;
offenses involving juridical persons;
public officers;
urgent legal action;
cybercrime or transnational elements;
offenses where barangay conciliation is not required; or
cases already beyond the barangay’s authority.

Whether barangay conciliation applies depends on the facts and the offense.

XXXVI. NBI Cybercrime Complaints

A significant number of NBI complaints today involve online activity. In cybercrime complaints, the affidavit should be especially detailed.

It should identify:

the platform used;
account names;
profile links;
URLs;
screenshots;
timestamps;
transaction references;
IP-related information, if available;
device used;
identities of persons involved;
how the complainant discovered the offense;
how the respondent is linked to the online account;
whether the content remains online;
whether preservation requests were made; and
the harm caused.

Cybercrime complaints often require urgent preservation of data because online content may be deleted, accounts may be deactivated, and logs may be retained only for limited periods.

XXXVII. NBI Subpoenas to Online Platforms, Banks, and Companies

In complaints involving scams, identity theft, online threats, or financial fraud, subpoenas may be directed to companies or institutions.

The NBI may seek:

account holder information;
transaction details;
KYC records;
login records;
IP logs;
phone numbers;
email addresses;
CCTV footage;
delivery records;
remittance details;
employment records;
corporate documents; and
other information relevant to identity or transaction tracing.

However, companies may raise privacy, bank secrecy, data protection, confidentiality, or procedural objections. Some records may require court orders, lawful authority, or compliance with special laws.

XXXVIII. Data Privacy Considerations

The Data Privacy Act affects how personal information is collected, processed, shared, and disclosed. However, it does not automatically prevent disclosure of information for legitimate law enforcement purposes.

In NBI investigations, privacy issues may arise when subpoenas seek:

personal data;
account information;
transaction records;
communications;
employment data;
customer records;
subscriber information;
medical records;
school records; or
sensitive personal information.

A recipient institution should evaluate whether the request is lawful, specific, necessary, and properly authorized.

XXXIX. Bank Records and Financial Information

Complaints involving estafa, scams, money laundering, bouncing checks, or unauthorized transfers often require bank records.

However, bank information may be protected by bank secrecy and related laws. The NBI may request information, but banks often require strict compliance with legal requirements before disclosure.

Complainants should at least preserve and submit their own transaction records, such as:

deposit slips;
transfer confirmations;
account numbers used by the respondent;
screenshots of payment instructions;
receipts;
bank statements showing the outgoing transfer; and
demand letters.

The NBI or prosecutor may determine what further legal steps are needed to obtain protected records.

XL. Corporate Respondents and Officer Liability

When a complaint involves a corporation, the affidavit must identify the specific acts of officers, directors, employees, agents, or representatives.

A corporation may act only through natural persons, but not every officer is automatically criminally liable for acts of the corporation. The complaint should show personal participation, authorization, knowledge, conspiracy, negligence where penalized, or another legal basis for liability.

A weak complaint simply naming all officers may be challenged for lack of specific allegations.

XLI. Jurisdiction and Venue

The affidavit should state facts showing where the offense occurred. Venue matters because criminal actions are generally filed where the offense or any essential element occurred.

In online offenses, venue may be more complicated. Relevant places may include:

where the complainant accessed or received the communication;
where the post was uploaded;
where the respondent acted;
where the damage occurred;
where the transaction was made;
where the bank account was maintained;
where the device was used; or
where the law allows filing under special rules.

A poorly stated venue may delay the complaint or lead to jurisdictional objections.

XLII. Prescription of Offenses

Crimes must generally be prosecuted within prescriptive periods. The period depends on the offense and penalty.

The affidavit should therefore state relevant dates, including:

date of commission;
date of discovery;
date of demand;
date of last communication;
date of injury;
date of payment;
date of publication;
date of dishonor of check; and
date complaint was filed.

Delay in filing may be raised by the respondent. However, the legal effect of delay depends on the applicable prescriptive period and circumstances.

XLIII. Probable Cause

The purpose of a criminal complaint at the preliminary stage is not to prove guilt beyond reasonable doubt. That standard applies at trial.

At the investigation or preliminary investigation stage, the question is usually whether there is probable cause.

Probable cause generally means that, based on the evidence, there is reasonable ground to believe that:

a crime has been committed; and
the respondent is probably guilty of it.

Affidavits are therefore evaluated not as final proof of guilt, but as evidence supporting or negating probable cause.

XLIV. Standard of Detail Required

A complaint-affidavit need not read like a full court decision. But it must be specific enough to show the factual basis of the accusation.

It should answer:

Who committed the act?
What exactly was done?
When did it happen?
Where did it happen?
How was it done?
Why does it constitute a crime?
What evidence supports it?
What damage or injury resulted?
How is the respondent connected?
What relief or action is requested?

The more serious the allegation, the more important clarity and evidence become.

XLV. Interaction Between NBI Findings and Prosecutorial Discretion

Even if the NBI recommends prosecution, the prosecutor may still dismiss the complaint for lack of probable cause.

Likewise, even if an NBI investigator is initially skeptical, additional evidence may later strengthen the complaint.

The NBI’s findings are influential but not always controlling. The prosecutor independently evaluates the complaint, affidavits, annexes, counter-affidavits, and applicable law.

XLVI. Arrests, Warrants, and NBI Subpoenas

Receiving an NBI subpoena is different from being arrested.

A subpoena is a notice to appear or produce evidence. A warrant of arrest is issued by a judge after a judicial determination of probable cause, usually after the filing of a criminal information in court.

However, a person should be cautious if the case involves a possible warrant, entrapment operation, inquest, or ongoing criminal activity. In serious cases, counsel should be consulted immediately.

XLVII. Entrapment, Surveillance, and Case Build-Up

Some NBI complaints involve entrapment operations, surveillance, controlled delivery, undercover communication, or technical tracing.

Affidavits in such cases may come from:

complainants;
NBI agents;
poseur-buyers;
surveillance officers;
forensic personnel;
arresting officers;
evidence custodians; and
witnesses.

These affidavits should establish the legality of the operation, identity of participants, chain of custody, and factual basis for arrest or prosecution.

XLVIII. Affidavits of NBI Agents

When the NBI endorses a complaint, agents may execute affidavits describing:

how the complaint was received;
what investigation was conducted;
what documents were reviewed;
what records were obtained;
what interviews were conducted;
what operations were performed;
what evidence was recovered;
how the respondent was identified;
how chain of custody was maintained; and
why prosecution is recommended.

These affidavits may support the complaint before the prosecutor.

XLIX. Sworn Statements Taken at the NBI

Sometimes, a complainant, witness, or respondent may be asked to give a sworn statement at the NBI.

Before signing, the affiant should:

read the entire statement;
correct errors;
confirm dates and names;
ensure the statement reflects what was actually said;
avoid signing pages with blanks;
ask for translation if needed;
request a copy;
ensure annexes are correctly identified; and
consult counsel if the statement may create liability.

A signed sworn statement may later be used in proceedings.

L. Can a Person Refuse to Submit an Affidavit?

A complainant who refuses to submit an affidavit may have difficulty pursuing the complaint because the affidavit is often the main basis for action.

A respondent may choose not to submit a counter-affidavit, but this carries risk. The investigator or prosecutor may resolve the matter based on the complainant’s evidence.

A witness may have legal grounds to decline certain questions or protect privileged information, but refusal should be based on valid legal grounds, not mere preference.

LI. Privileged Communications

Certain communications may be privileged, including lawyer-client communications, certain marital communications, and other legally protected information.

If a subpoena demands privileged material, the recipient may object or seek legal protection.

The privilege must be properly invoked. It is not enough to make a broad claim of confidentiality.

LII. False Affidavits and Perjury

An affidavit is made under oath. Knowingly making false statements in an affidavit may expose the affiant to criminal liability, including perjury or other offenses depending on the circumstances.

A person should not:

invent facts;
alter screenshots;
submit fake receipts;
exaggerate losses;
falsely identify a respondent;
conceal material facts;
coach witnesses to lie;
submit backdated documents; or
sign an affidavit they know to be untrue.

False affidavits can damage credibility and create separate liability.

LIII. Withdrawal or Correction of Affidavits

If an affidavit contains errors, the affiant may execute a supplemental or corrective affidavit. The correction should be transparent and explain the mistake.

If a material statement was wrong, it is better to correct it early than allow it to undermine the case later.

However, repeated corrections may raise credibility concerns, especially if the changes appear strategic or inconsistent.

LIV. Affidavit of Desistance Versus Recantation

An affidavit of desistance usually states that the complainant no longer wants to pursue the case. A recantation states that previous accusations were false or inaccurate.

Courts and prosecutors view recantations carefully because they may be caused by settlement, pressure, fear, intimidation, family influence, or other improper reasons.

A recantation does not automatically erase prior sworn statements. The surrounding circumstances matter.

LV. Practical Checklist for Complainants

Before filing with the NBI, a complainant should prepare:

valid identification;
complaint-affidavit;
witness affidavits;
documents proving the offense;
screenshots and digital files;
proof of payment or damage;
demand letter, if applicable;
proof of delivery of demand;
respondent’s identifying information;
timeline of events;
list of witnesses;
original documents, if available;
copies for filing;
digital backups; and
a clear explanation of why the act is criminal.

The complaint should be organized. Investigators handle many complaints, and a clear file helps the case.

LVI. Practical Checklist for Respondents

A respondent who receives an NBI subpoena should:

read the subpoena carefully;
verify authenticity;
note the deadline and appearance date;
identify whether they are a respondent, witness, or records custodian;
request a copy of the complaint and attachments, if not provided;
consult counsel;
avoid contacting the complainant in a way that may be misinterpreted;
preserve relevant evidence;
prepare a timeline;
gather documents;
identify witnesses;
avoid destroying records;
avoid making public statements;
prepare a counter-affidavit where appropriate; and
attend or validly request postponement.

LVII. Practical Checklist for Companies Receiving NBI Subpoenas

A company receiving an NBI subpoena should:

refer the subpoena to legal or compliance personnel;
verify the issuing NBI office;
determine the scope of requested documents;
preserve relevant records;
assess privacy and confidentiality issues;
determine whether a court order is needed;
appoint an authorized representative;
prepare certified records where lawful;
document what was disclosed;
avoid over-disclosure;
comply with lawful requests;
object to improper or overly broad requests; and
maintain chain of custody.

Companies should not casually release sensitive data without legal review.

LVIII. How Affidavits Are Evaluated

Investigators and prosecutors look at several factors:

consistency of narration;
personal knowledge;
specificity;
documentary support;
credibility of witnesses;
plausibility of events;
legal sufficiency;
identification of respondent;
presence or absence of criminal intent;
corroboration;
motive to fabricate;
delay in filing;
contradictions;
admissibility concerns; and
whether the facts satisfy the elements of the offense.

A short affidavit may be sufficient if it is clear and supported. A long affidavit may still fail if it is confusing or unsupported.

LIX. Criminal Complaint Versus Civil Claim

Many disputes have both civil and criminal aspects. For example, a failed transaction may be a simple breach of contract or may amount to estafa depending on deceit and intent.

The affidavit should clearly explain why the facts constitute a crime, not merely a private dispute.

Examples:

Non-payment of debt is not automatically estafa.
Breach of contract is not automatically criminal.
Business failure is not automatically fraud.
A mistaken statement is not automatically falsification.
Harsh criticism is not automatically libel.
Failure to deliver goods may be civil or criminal depending on deceit, intent, and evidence.

This distinction is often central in NBI and prosecutor evaluations.

LX. Importance of Demand Letters

Demand letters are important in certain complaints, especially where demand helps prove refusal, bad faith, misappropriation, dishonor, or opportunity to comply.

A demand letter may be relevant in:

estafa;
bouncing checks;
misappropriation;
unpaid obligations with alleged fraud;
return of property;
employer-employee accountability cases; and
some commercial disputes.

The affidavit should state when demand was made, how it was sent, what was demanded, and whether the respondent complied.

LXI. Affidavits in Bouncing Check Complaints

For bouncing check complaints, affidavits often need to establish:

issuance of the check;
identity of issuer;
amount;
date;
purpose;
presentment;
dishonor;
reason for dishonor;
notice of dishonor;
receipt or proof of notice;
failure to pay within the period required by law; and
damages or unpaid amount.

Supporting documents may include the check, bank return slip, demand letter, proof of service, and transaction documents.

LXII. Affidavits in Estafa Complaints

In estafa complaints, the affidavit should clearly distinguish fraud from mere non-performance.

It should show:

the false representation or deceit;
when the deceit occurred;
how the complainant relied on it;
what money or property was delivered;
how the respondent received or benefited;
the damage caused;
demand, where relevant;
failure or refusal to return or comply;
respondent’s intent or acts showing fraud; and
supporting documents.

Statements like “I was scammed” are not enough. The affidavit should explain the specific fraudulent acts.

LXIII. Affidavits in Cyberlibel Complaints

A cyberlibel complaint should include:

the exact defamatory statement;
screenshot or printout of the post;
URL or link;
date and time of publication;
identity of the account or poster;
explanation of how the complainant is identifiable;
why the statement is defamatory;
proof that third persons saw or could access it;
effect on reputation;
witnesses who saw the post; and
facts connecting the respondent to the account.

The affidavit should avoid vague references to “bad posts” or “defamation” without quoting or attaching the actual publication.

LXIV. Affidavits in Threat Complaints

A threat complaint should include:

the exact words used;
date and time;
place or platform;
identity of sender;
context;
whether the threat was conditional;
whether the complainant feared for safety;
screenshots or recordings;
witnesses;
prior incidents; and
police or barangay reports, if any.

Exact wording matters because the legal classification may depend on the nature of the threat.

LXV. Affidavits in Falsification Complaints

A falsification complaint should identify:

the document involved;
whether it is public, official, commercial, or private;
the allegedly false statement, signature, entry, alteration, or document;
who made or used it;
why it is false;
how the complainant discovered it;
how it caused damage or legal effect;
specimen signatures or authentic documents, if relevant;
certification from record custodians; and
expert or handwriting evidence, where needed.

The affidavit should not merely state that a document is fake. It should explain why and how.

LXVI. Affidavits in Physical Injury Complaints

For physical injury complaints, the affidavit should include:

date, time, and place of assault;
identity of attacker;
manner of attack;
body parts injured;
medical treatment;
medico-legal certificate;
photos of injuries;
witnesses;
police or barangay report;
prior threats or motive; and
recovery period or incapacity.

Medical evidence is often crucial.

LXVII. Affidavits in VAWC Complaints

Complaints involving violence against women and children may include physical, psychological, sexual, or economic abuse.

The affidavit should describe:

relationship between parties;
acts of violence or abuse;
dates and locations;
injuries or psychological effects;
economic control or deprivation;
threats;
witnesses;
medical or psychological records;
barangay protection order or police report, if any;
children affected;
communications showing abuse; and
need for protection.

These cases may require urgent protection measures beyond the criminal complaint.

LXVIII. Affidavits in Identity Theft or Online Scam Complaints

The affidavit should include:

how the scam began;
platform used;
account names and links;
representations made;
amount paid;
mode of payment;
recipient account details;
screenshots of conversation;
proof of transfer;
failure to deliver or perform;
attempts to contact respondent;
blocking, deletion, or concealment;
other victims, if known; and
identifying information.

For identity theft, the affidavit should also show unauthorized use of personal information.

LXIX. Submission of Original Documents

Photocopies are often attached to affidavits, but originals should be preserved.

Originals may be required for:

comparison;
authentication;
forensic examination;
court presentation;
marking of evidence;
verification by investigator or prosecutor; and
trial.

A party should avoid surrendering the only original without receiving an acknowledgment or keeping certified copies, unless properly required.

LXX. Can Affidavits Be Amended?

Yes, affidavits may be supplemented or corrected, but amendments should be handled carefully.

A supplemental affidavit may be appropriate when:

new evidence is discovered;
additional witnesses come forward;
dates need clarification;
annexes were omitted;
respondent identity becomes clearer;
damages are updated; or
the investigator requests more detail.

The supplemental affidavit should not contradict the original without explanation.

LXXI. Role of the Lawyer in Preparing Affidavits

A lawyer helps ensure that the affidavit is:

legally relevant;
factually accurate;
properly structured;
consistent with evidence;
aligned with the elements of the offense;
free from unnecessary admissions;
properly notarized;
supported by annexes;
not misleading; and
strategically sound.

However, the facts must come from the affiant. A lawyer should not invent facts or pressure an affiant to make false statements.

LXXII. Ethical Considerations

Affidavits should be truthful. Lawyers, complainants, respondents, and witnesses must avoid misuse of criminal process.

Improper practices include:

filing criminal complaints purely to collect debt;
using NBI subpoenas to harass;
threatening criminal prosecution for leverage without basis;
fabricating evidence;
coaching witnesses to lie;
suppressing exculpatory evidence;
forum shopping;
using confidential records unlawfully; and
public shaming before investigation is completed.

Criminal complaints carry serious consequences and should not be abused.

LXXIII. Publicity and Social Media

Parties should be careful about posting NBI subpoenas, affidavits, complaint details, or accusations online.

Risks include:

defamation liability;
violation of privacy rights;
prejudicing the investigation;
witness intimidation allegations;
contempt-related issues in later proceedings;
data privacy complaints;
retaliation;
disclosure of confidential information; and
weakening settlement possibilities.

A party may feel emotionally justified in posting, but it can create new legal problems.

LXXIV. Confidentiality of Investigation

Not all investigative records are automatically public. Access may depend on the stage of proceedings, nature of records, privacy considerations, and applicable rules.

Parties should ask the investigator or counsel about obtaining copies of:

complaint-affidavit;
annexes;
counter-affidavit;
subpoenas;
certifications;
investigation reports; and
endorsements to the prosecutor.

Unauthorized disclosure of sensitive materials may have consequences.

LXXV. What Happens After Submission to the NBI?

After affidavits and evidence are submitted, the NBI may:

require additional documents;
summon more witnesses;
conduct forensic examination;
coordinate with banks or platforms;
conduct surveillance;
recommend dismissal;
recommend filing with the prosecutor;
conduct or support an entrapment operation;
refer the matter to another agency;
prepare a final investigation report; or
endorse the case to the Department of Justice or local prosecutor.

The timeline varies significantly depending on complexity, evidence, cooperation of parties, and agency workload.

LXXVI. What Happens at the Prosecutor’s Office?

If the complaint reaches the prosecutor, the prosecutor may conduct preliminary investigation, require counter-affidavits, allow reply and rejoinder, conduct clarificatory hearings, and eventually issue a resolution.

The prosecutor may:

dismiss the complaint;
find probable cause;
file an information in court;
recommend further investigation;
refer the matter to another office;
require additional evidence; or
approve a lesser or different charge.

If an information is filed in court, the case proceeds to judicial stages such as arraignment, pre-trial, trial, and judgment.

LXXVII. Practical Tips for Drafting Strong Affidavits

A strong affidavit should be:

chronological;
specific;
factual;
supported by documents;
free from exaggeration;
written in understandable language;
consistent with annexes;
focused on legal elements;
clear on identity and participation;
careful with dates and amounts;
respectful in tone;
properly sworn;
complete but not unnecessarily long;
organized with headings, where helpful; and
reviewed before signing.

The affidavit should tell the investigator or prosecutor exactly what happened and why it matters legally.

LXXVIII. Practical Tips for Responding to an NBI Subpoena

A person receiving an NBI subpoena should:

not panic;
not ignore it;
verify it;
preserve evidence;
consult counsel;
avoid contacting opposing parties recklessly;
avoid deleting messages or files;
prepare a timeline;
secure copies of relevant documents;
attend if required;
request postponement if necessary;
submit a careful counter-affidavit where appropriate;
assert rights respectfully; and
keep records of all submissions.

The early response can affect the direction of the investigation.

LXXIX. Frequently Asked Questions

1. Does receiving an NBI subpoena mean I will be arrested?

No. A subpoena is generally a notice to appear or produce documents. It is not the same as a warrant of arrest.

2. Can I bring a lawyer to the NBI?

Yes. A person summoned by the NBI, especially a respondent, may be assisted by counsel.

3. Should I submit a counter-affidavit?

If you are a respondent, submitting a counter-affidavit is often important because it allows you to present your side. Whether to submit one and what to include should be carefully considered.

4. Can I ignore the subpoena if I believe the complaint is false?

Ignoring it is usually risky. A false complaint can be answered through a proper counter-affidavit and evidence.

5. Can the NBI dismiss a complaint?

The NBI may close, archive, or decline further action on an investigation, or recommend dismissal. But if the case is before the prosecutor, the prosecutor determines probable cause.

6. Is a notarized affidavit required?

Affidavits are generally sworn documents. Notarization or administration of oath by an authorized officer is ordinarily required for formal submission.

7. Can screenshots be used as evidence?

Yes, but their authenticity, completeness, context, and connection to the respondent may be challenged. Preserve original digital files where possible.

8. Can a complaint proceed even if the complainant withdraws?

Yes, depending on the offense and evidence. Criminal offenses are generally treated as offenses against the State.

9. Can I ask for more time to submit a counter-affidavit?

Usually, a party may request an extension or resetting for valid reasons. It should be done formally and before the deadline when possible.

10. Is settlement allowed?

Settlement may occur in some cases, but it does not always extinguish criminal liability. The effect depends on the offense and stage of proceedings.

LXXX. Conclusion

An NBI subpoena and the affidavits submitted in response to it can shape the future of a criminal complaint. The subpoena brings parties, witnesses, or records into the investigative process. The affidavit supplies the facts under oath. Together, they help investigators and prosecutors determine whether a case has legal and evidentiary basis.

For complainants, the key is to present a truthful, specific, well-supported narrative that satisfies the elements of the offense. For respondents, the key is to respond carefully, preserve rights, and submit a factual and legally sound counter-affidavit when appropriate. For companies and third parties, the key is lawful compliance balanced with privacy, confidentiality, and procedural safeguards.

Because criminal complaints can affect liberty, reputation, employment, property, and civil rights, NBI subpoenas and affidavits should never be treated casually. They require accuracy, preparation, and careful legal judgment.

This article is for general legal information in the Philippine context and is not a substitute for advice from a lawyer who can evaluate the specific facts and documents of a particular case.