Quick answer

A formal demand letter should clearly identify the parties and obligation, explain why performance is already due, state the exact amount or act required, give the applicable deadline, and describe only lawful next steps. Sign it and serve it through the method required by the contract—preferably supplemented by personal delivery, registered mail or reputable courier, and email—and preserve reliable proof that the correct recipient actually received it.

Philippine law generally does not require a demand to be notarized, written by a lawyer, or presented in a particular format. An extrajudicial demand may even be oral, but a written letter is far easier to prove. Under Article 1169 of the Civil Code, demand ordinarily places an obligor in delay or default if the obligation is already due and the obligor still fails to perform. Exceptions, special contracts, and proceedings such as ejectment and cases involving dishonored checks have additional requirements.

A demand letter is not a court order. It does not authorize the sender to seize property, garnish an account, evict an occupant, or have someone arrested.

What the letter should accomplish

A sound demand letter should establish five points:

Who owes the obligation and to whom.
What legal or contractual obligation exists.
Why that obligation is already due and demandable.
Exactly what performance will satisfy the demand.
When and how the recipient must comply.

Under Article 1159 of the Civil Code, contractual obligations have the force of law between the parties. Review the contract before drafting the letter, especially provisions on notices, addresses, default, cure periods, acceleration, interest, penalties, dispute resolution, and venue. Follow a contractual notice clause exactly where possible.

The demand should be unequivocal. A message that merely asks when the debtor might be able to pay, invites a discussion without demanding performance, or states inconsistent amounts may not establish the intended default.

Check these matters before writing

Confirm the correct party

Use the recipient’s complete legal name and current address. Check the contract, valid identification, invoices, official receipts, SEC or DTI records, and prior correspondence.

For a corporation or other juridical entity, address the entity itself at its registered or contractual address, with attention to an appropriate officer or authorized representative. A sole proprietorship is not a separate juridical person from its proprietor, so identify the proprietor as well as the business name when known.

If the letter is sent for a company, estate, association, or another person, the signatory should identify their position and authority. Preserve any board authorization, secretary’s certificate, special power of attorney, or other document supporting that authority when applicable.

Verify that performance is due

Identify the maturity date, triggering event, invoice date, delivery, acceptance, completion of work, or other basis for saying the obligation is due. If the agreement has a grace or cure period, observe it.

If there is no clear due date, the result may depend on whether the obligation is immediately demandable, conditional, or one for which the parties intended a period that may have to be fixed by a court. Obtain legal advice before declaring default or accelerating the entire balance.

For reciprocal obligations, Article 1169 provides that neither party ordinarily incurs delay if the other has not performed or is not ready to perform properly. The sender should therefore state, and be able to prove, their own performance or readiness to perform.

Reconcile the amount

Prepare a separate computation showing:

Original principal or contract price
Each payment or credit, with dates
Remaining principal
Contractual interest, if validly stipulated
Penalties or late charges, with their contractual basis
Other charges, with supporting documents
Total as of a stated date

Do not silently add collection fees, attorney’s fees, damages, or interest that the contract or law does not support.

Stipulated monetary interest generally must be in writing. Courts may reduce or invalidate unconscionable interest and penalties. Where compensatory interest is legally recoverable, the prevailing legal rate is generally 6% per year in the absence of an applicable valid stipulation, but its rate and starting date depend on the nature and certainty of the claim. For an unliquidated claim that could not be reasonably quantified when demanded, interest may begin only when the amount is judicially determined. The Supreme Court’s current framework is explained in Lara’s Gifts & Decors, Inc. v. Midtown Industrial Sales, Inc..

Attorney’s fees are likewise not automatically payable merely because a demand letter claims them. In the absence of a contractual stipulation, they may be awarded only in circumstances recognized by Article 2208 of the Civil Code, and the amount must be reasonable.

How to structure the letter

1. Date and delivery methods

Use the true date of signing. State the intended delivery methods, for example:

VIA PERSONAL DELIVERY, REGISTERED MAIL, AND EMAIL

Do not backdate the letter or change its contents after service. If a correction is necessary, issue and serve a clearly dated replacement or supplemental letter.

2. Sender and recipient details

Include the sender’s name, address, telephone number, and email address. State the recipient’s complete name and service address.

3. Specific subject line

Examples include:

Formal Demand for Payment Under Promissory Note dated [date]
Final Demand to Deliver [specific property]
Demand to Complete Contracted Work and Cure Breach
Demand to Pay Rentals and Vacate Leased Premises

4. Short factual history

Present material facts chronologically and neutrally. Identify the contract, transaction, invoice, check, property, or service involved. Use document dates and reference numbers.

Avoid insults, accusations that cannot be proved, and unnecessary personal history.

5. Basis of the obligation

State the relevant contractual clause or legal basis without overstating it. Attach copies of the essential documents, but retain the originals.

If the sender must first perform something, describe what has already been done or what the sender remains ready to do.

6. Exact demand

State precisely what the recipient must do. For a money claim, specify the amount and computation date. For nonmonetary performance, describe the act, property, documents, or corrective work required.

Avoid vague wording such as “settle your account immediately” without identifying the account and amount.

7. Compliance deadline

First use the period stated in the contract or applicable special law. If neither supplies a period, choose a reasonable period based on the nature of the obligation. There is no universal Philippine rule that every demand letter must give 5, 10, 15, or 30 days.

State whether the period consists of calendar or banking days and whether it runs from actual receipt. Avoid conflicting deadlines such as “within ten days from receipt, but no later than [date]” unless the interaction between those dates is deliberate and legally sound.

8. Method of compliance

Give workable payment or delivery instructions. For payment, identify the payee and accepted method without unnecessarily exposing sensitive bank information. Offer to issue an acknowledgment or official receipt.

Provide a contact method for a documented dispute, proposed payment plan, or request for a written payoff figure. An invitation to communicate should not make the demand itself ambiguous.

9. Lawful next steps

State only remedies that may legally be pursued. A safe formulation is:

If you do not fully comply within the stated period, I reserve the right to pursue the remedies available under our agreement and Philippine law, including applicable barangay proceedings and civil action, without further notice where the law permits.

Do not threaten arrest, public humiliation, violence, seizure without legal process, or criminal charges unsupported by the facts. The Constitution prohibits imprisonment merely for debt, although separate acts may constitute offenses under laws such as Batas Pambansa Blg. 22 or the Revised Penal Code.

10. Signature and attachments

Sign above the sender’s printed name and capacity. List every attachment. Initialing pages and keeping an identical signed file copy can help establish which version was served.

Adaptable demand-letter form

[True date]

VIA [PERSONAL DELIVERY / REGISTERED MAIL / COURIER / EMAIL]

[Recipient’s complete legal name] [Position and entity, if applicable] [Complete address]

Subject: Formal Demand for [payment or specific performance]

Dear [Mr./Ms./Mx./Entity Name]:

On [date], [briefly identify the contract, loan, sale, lease, service, delivery, or other transaction]. Under [identify the document and relevant provision], you undertook to [describe the obligation] on or before [due date or triggering event].

I/We performed the corresponding obligation by [briefly describe performance and supporting document], or remain ready to perform as follows: [details, if applicable].

As of [computation date], your outstanding obligation is PHP [amount], consisting of:

Principal or unpaid contract amount: PHP [amount]

Less payments or credits: PHP [amount]

Interest or penalties supported by [contractual provision or other basis]: PHP [amount]

Total due as of [date]: PHP [amount]

A detailed statement of account and copies of the supporting documents are attached.

I/We hereby formally demand that you [pay the stated amount / deliver the identified property / complete the specified work / cure the stated breach] within [number] [calendar/banking] days from your actual receipt of this letter.

Compliance may be made through [clear payment, delivery, or performance instructions]. Please obtain a written acknowledgment or official receipt. If you dispute any item, send your specific written objection and supporting documents to [contact details] within the same period.

If you do not fully comply within that period, I/we reserve the right to pursue the remedies available under the agreement and Philippine law, including applicable barangay proceedings and civil action, without further notice where legally permitted. Nothing in this letter waives any existing right, remedy, claim, or defense.

Sincerely,

[Signature] [Printed name] [Capacity or authority, if applicable] [Contact details]

Attachments:

[Contract, promissory note, invoice, or other document]

[Statement of account]

[Delivery receipt, acknowledgment, or proof of performance]

[Other relevant document]

This is a general form. Do not use it unchanged where a statute, procedural rule, contract, or regulatory framework requires special wording or service.

How to serve the letter

A private demand letter is not a pleading or summons. The Rules of Court governing service of court papers do not automatically determine whether an ordinary private letter was received. The central practical issue is evidence: can the sender later prove what was delivered, to whom, when, where, and by what method?

Follow the contract first

If the contract requires delivery to a specified address or by registered mail, courier, email, or multiple methods, follow that clause. A courtesy copy sent elsewhere should supplement, not replace, the required method.

If the contractual address appears obsolete, send to that address and to any reliably verified current address, unless legal advice indicates otherwise.

Personal delivery

Prepare at least two identical signed copies. Ask the recipient or authorized receiving person to sign and date the sender’s copy and write their printed name, position, and time of receipt.

If the recipient refuses:

Do not force entry, trespass, or create a confrontation.
Have a neutral adult server record the date, time, place, person approached, words used, and circumstances of the refusal.
Keep contemporaneous notes and, when appropriate, execute a notarized affidavit of service.
Send another copy through registered mail or courier.

A server’s affidavit documents the attempt but does not automatically establish actual receipt. Special proceedings may demand stronger proof.

Registered mail

Keep:

The signed letter and complete attachments
The original registry receipt
Tracking records
The registry return card or other proof of delivery
The returned envelope and postal markings if undelivered
The identity and potential testimony or affidavit of the person who mailed it

Proof that a letter was sent is not always proof that it was received. In Pineda v. Vda. de Vega, the Supreme Court emphasized the evidentiary importance of proving receipt, not merely the letter’s existence.

Courier

Use a service that records the tracking number, address, delivery date, recipient’s name or signature, and delivery status. Preserve the waybill, receipt, proof-of-delivery page, and any delivery photograph supplied by the courier.

Email or electronic messaging

Electronic documents are not denied legal effect merely because they are electronic, but they must still be authenticated and shown to be reliable. The relevant primary authorities are the Electronic Commerce Act and the Supreme Court’s Rules on Electronic Evidence.

Send the signed letter as a non-editable attachment to an address previously used by the recipient or designated in the contract. Preserve:

The original sent email with full headers
The exact attachment
Delivery or read acknowledgments
Replies admitting receipt
Server or platform records
A backup export, not merely a screenshot

Unless the contract or applicable rule clearly permits email alone, use it as a supplement to a provable physical method. A “sent” indicator does not necessarily prove that the intended recipient received or opened the letter.

Special situations requiring different treatment

Dishonored checks and Batas Pambansa Blg. 22

A generic collection letter may be inadequate for a possible BP 22 case. The written notice should clearly identify each check, the drawee bank, check number, date, amount, and fact and reason for dishonor.

Under Section 2 of Batas Pambansa Blg. 22, the statutory prima facie presumption of knowledge concerns a check presented within 90 days of its date and gives the maker or drawer five banking days after receiving notice of dishonor to pay or arrange full payment. Supreme Court decisions require careful proof that the written notice was actually received.

When notice is sent by registered mail, Resterio v. People explains that proof ordinarily includes the registry receipt, registry return receipt, and authentication by the person who mailed the notice through an affidavit or testimony. Because defects can be fatal to a criminal complaint, consult counsel before serving or acting on a BP 22 notice.

Nonpayment of rent and unlawful detainer

Where unlawful detainer is based on nonpayment of rent or violation of lease conditions, the demand should ordinarily require both:

Payment or compliance with the lease; and
Vacation and surrender of the premises.

Under Section 2, Rule 70 of the 2019 Amendments to the Rules of Civil Procedure, unless otherwise stipulated, a lessor’s action may be commenced only after the demand and the lessee’s failure to comply after 15 days in the case of land or five days in the case of buildings. Different analysis may apply when the lease expired or possession began through tolerance.

An unlawful-detainer action generally must be filed within one year from the legally relevant demand. Later letters that merely repeat an earlier demand do not necessarily restart that period. Obtain prompt advice rather than attempting to preserve the remedy through repeated reminders.

Small claims

The current small-claims limit is PHP 1,000,000 or less, exclusive of interest and costs, for claims within the scope of the Supreme Court’s Rules on Expedited Procedures in the First Level Courts. The claimant’s information form calls for the latest demand letter, if any, together with proof of service and receipt, and a Certificate to File Action from the barangay when necessary. Forms and the governing rule are available on the Supreme Court small-claims page and in the Rules on Expedited Procedures.

A demand letter does not by itself establish the debt. The claimant must still preserve the actionable document, computation, receipts, acknowledgments, affidavits, and other supporting evidence.

Barangay conciliation

Before filing in court, Katarungang Pambarangay proceedings may be mandatory when the dispute falls within the lupon’s authority and the individual parties actually reside in the same city or municipality. Important exceptions apply, including certain disputes involving government parties, juridical entities, residents of different cities or municipalities, urgent provisional remedies, and actions that may otherwise become time-barred.

Review Sections 408–412 of the Local Government Code. When conciliation is required, obtain the proper Certificate to File Action before going to court.

Regulated financial-service collections

Financial-service providers must not use abusive collection or debt-recovery practices and must respect client privacy. Relevant rules include the Financial Products and Services Consumer Protection Act and, for financing and lending companies, SEC Memorandum Circular No. 18, Series of 2019.

Do not publicly shame a debtor, disclose the debt indiscriminately to family members or coworkers, impersonate a government official, or threaten action that is not legally available.

Evidence to preserve

Keep a single chronological file containing:

The original contract, promissory note, lease, purchase order, or acknowledgment
Invoices, statements of account, official receipts, and payment records
Delivery receipts, acceptance documents, and proof of the sender’s performance
Relevant emails, messages, and letters in their original form
Dishonored checks and bank return slips, where applicable
The final signed demand and every attachment
Registry receipts, return cards, courier records, and returned envelopes
Email headers, delivery records, and replies
The server’s contemporaneous notes and affidavit
The recipient’s acknowledgment, settlement offer, or written dispute
Records of partial payments made after demand
Barangay documents and certificates, if applicable

Never alter an original record. If annotations are necessary, place them on a working copy.

Common mistakes

Demanding from the wrong individual or business entity
Using an outdated or incomplete address without following the contract
Sending the letter before the obligation becomes due
Failing to show that the sender performed their reciprocal obligation
Stating a total without a transparent computation
Adding unsupported interest, penalties, damages, or attorney’s fees
Giving inconsistent deadlines
Failing to make an unequivocal demand
Relying only on a screenshot, tracking page, or unsigned copy
Assuming mailing alone proves receipt
Treating notarization as proof that the recipient received the letter
Omitting “pay or comply and vacate” in an applicable ejectment demand
Using a generic collection letter as a BP 22 notice
Repeatedly sending reminders while a filing period expires
Threatening arrest, public exposure, violence, or seizure without process
Disclosing the debt to unrelated persons
Accepting a partial payment without documenting its application and the remaining balance

If the recipient responds

Acknowledge receipt of any payment or written response. If the amount is disputed, request specific documents and compare them against the ledger.

Put any extension, installment plan, compromise, waiver, or restructuring agreement in writing. State:

The admitted balance
Payment dates and amounts
How payments will be applied
Treatment of interest and penalties
Consequences of default
Whether existing security remains effective
Whether the agreement replaces or merely supplements the original obligation
Whether any claim is being waived or released

Do not issue a full release until the agreed consideration has cleared and all conditions have been satisfied.

When legal help is urgent

Consult a Philippine lawyer promptly when:

A prescriptive or contractual deadline may be near
Possession of land or a building is involved
A check was dishonored and BP 22 is being considered
The debt is secured by a mortgage, pledge, guaranty, or suretyship
The other party appears insolvent or is disposing of assets
The amount, identity of the debtor, or authority of a signatory is disputed
The claim involves an estate, multiple heirs, a corporation, or several guarantors
The contract contains arbitration, foreign law, or special notice provisions
The matter belongs to a specialized forum, such as a labor, agrarian, family, consumer, administrative, or government-contract proceeding
A provisional remedy may be needed
The recipient has threatened violence or retaliation
The sender is considering criminal allegations or public disclosure

A written extrajudicial demand may interrupt prescription under Article 1155 of the Civil Code, but limitation periods and the effect of a particular demand are fact-sensitive. Do not use a demand letter as a reason to postpone filing advice.

FAQ

Must a lawyer write or sign the letter?

Not as a general rule. The creditor or authorized representative may write and sign it. Counsel is advisable when special statutory notice, significant property, a near deadline, criminal exposure, or a disputed contract is involved.

Must it be notarized?

Ordinarily, no. Notarization does not prove that the recipient received the letter. A notarized affidavit of service may help document how service was attempted or completed, but it remains subject to proof and evaluation.

Can it be sent only by email?

Sometimes, particularly if the contract designates email and reliable receipt can be proved. Otherwise, email is best used together with personal delivery, registered mail, or courier.

How many days should the recipient receive?

Use the contract or special law. If neither provides a period, allow a reasonable period suited to the required performance. There is no universal deadline for all Philippine demand letters.

Does receipt automatically make the recipient liable?

No. Receipt proves notice, not the validity of the underlying claim. The sender must still prove the obligation, maturity, breach, amount, and entitlement to the requested remedy.

Can 6% interest always be added?

No. Interest depends on the contract, nature of the obligation, default, certainty of the amount, and applicable Supreme Court rules. Do not add 6% mechanically or charge interest on interest without a valid basis.

What if the recipient refuses the letter?

Document the attempt carefully and use another provable method. Refusal may have legal consequences in some settings, but it is not a universal substitute for actual receipt. Obtain advice immediately for BP 22, ejectment, foreclosure, or another special proceeding.

What happens if the letter is ignored?

The next step may be negotiation, mandatory barangay conciliation, a small-claims case, an ordinary civil action, arbitration, or another specialized proceeding. The correct route depends on the parties, amount, documents, residence, contract, and remedy sought.

Official legal sources

This article provides general Philippine legal information, not legal advice or an attorney-client relationship. The proper wording, deadline, method of service, and next proceeding depend on the contract, documents, parties, and facts. Legal sources and procedures were checked as of August 1, 2026.