Quick answer

A formal demand letter should clearly identify the parties, explain the obligation and breach, state exactly what must be done, give an appropriate deadline, and warn—accurately and without harassment—what lawful remedy may follow. It should be delivered through a method that can prove both delivery and receipt.

For an ordinary private claim, Philippine law generally does not require the letter to be written by a lawyer or notarized. The contract, a special law, or the remedy you plan to pursue may impose stricter requirements. Before sending anything, check those requirements and confirm that the claim has not prescribed.

A demand letter does not guarantee payment, prove that every amount claimed is valid, or automatically entitle the sender to penalties, interest, damages, or attorney’s fees.

Why a demand letter matters

Under Article 1169 of the Civil Code, a person obliged to deliver or perform generally incurs legal delay when the creditor makes a judicial or extrajudicial demand. Demand is unnecessary when:

The obligation or the law expressly says so;
Timely performance was a controlling reason for the contract; or
Demand would be useless because performance has become impossible through the obligor’s act.

For reciprocal obligations, one party generally cannot place the other in delay while the first party has not performed, or is not properly ready to perform, their own obligation. Contractual obligations must be performed in good faith. These rules appear in Articles 1159 and 1169 of the Civil Code.

A written extrajudicial demand may also interrupt prescription under Article 1155. That does not revive a claim that had already prescribed or suspend every deadline indefinitely. The date the cause of action accrued, the correct prescriptive period, and the effect of earlier demands or acknowledgments can depend on the documents and facts.

Common Civil Code periods include ten years for actions based on a written contract, six years for an oral contract, and four years for injury to rights or a quasi-delict. Special laws may provide different periods. Forcible entry and unlawful detainer are subject to a one-year period whose starting point can be fact-sensitive. Never delay filing solely because a letter was sent.

Before drafting

Confirm the legal and factual basis

Review the complete transaction, including:

The signed contract and amendments;
Promissory notes, invoices, purchase orders, statements of account, receipts and checks;
Delivery records, acceptance certificates and completion reports;
Emails, messages and prior promises to pay or perform;
Any notice-and-cure, dispute-resolution, arbitration or venue clause;
Earlier demands, replies, partial payments and acknowledgments;
The correct identity and address of every responsible party; and
Applicable barangay, administrative or court prerequisites.

Determine what is presently due. Do not demand payment for an installment that has not matured, terminate a contract without a legal or contractual basis, or claim against a guarantor before the conditions governing the guaranty have been checked.

Reconcile the amount

Prepare a calculation that another person can follow. Separate:

Principal;
Payments and credits;
Contractual interest;
Penalties or liquidated damages;
Taxes or reimbursable charges; and
The total as of a stated date.

Do not add collection costs, attorney’s fees or interest merely to pressure the recipient. Under Article 2208 of the Civil Code, attorney’s fees as damages are exceptional unless validly stipulated, must have a legal and factual basis, and must be reasonable. Courts do not award them automatically just because a claimant prevails.

Check the proper sender and recipient

The letter should come from the person entitled to enforce the obligation or an authorized representative. For a company, confirm the signatory’s authority.

Address the letter to the exact contracting party. If the debtor is a corporation, use its complete registered name and known principal or registered-office address. Send separate notices to co-debtors, guarantors, sureties, drawers of checks, or other persons only if the documents and law support a claim against them.

What the letter should contain

1. Date and delivery method

Use the actual date of signing. Identify the intended methods, such as personal delivery and registered mail.

2. Complete recipient details

State the recipient’s full name or registered business name and the most reliable address. Include an account, contract, invoice or property reference where useful.

3. A concise factual history

Explain:

What agreement, transaction or legal duty created the obligation;
What the sender performed;
What the recipient was required to do;
When performance became due; and
What remains unpaid or unperformed.

Use dates, document numbers and amounts. Avoid insults, conclusions about motives, and allegations that cannot be proved.

4. The contractual or legal basis

Quote only the relevant portion of the contract, if necessary. Identify any clause concerning payment, default, cure periods, termination, notice or dispute resolution. Do not overload an ordinary letter with case citations.

5. The precise demand

Say exactly what compliance requires. For example:

Pay a stated amount;
Deliver specified property or documents;
Complete or correct defined work;
Stop a particular contractual violation; or
Pay arrears and vacate leased premises, when that is the legally appropriate demand.

If payment is demanded, provide a secure payment method and explain how the recipient can obtain an updated computation.

6. A definite deadline

Use an objectively measurable deadline, such as “within ten calendar days from receipt of this letter.” State “banking days” only when the law or contract uses that term.

There is no universal rule that every demand letter must give three, five, seven, ten or fifteen days. The deadline must comply with the contract and any applicable special rule. It should also be reasonable in light of the required performance.

7. The next lawful step

State the remedy accurately and conditionally:

If you do not comply within the stated period, I may pursue the remedies available under the contract and Philippine law, without further notice where legally permitted.

Do not threaten automatic arrest, conviction, public humiliation, seizure without legal process, or consequences that the sender cannot lawfully impose. The Constitution prohibits imprisonment for debt, although separate conduct—such as issuing a dishonored check—may be governed by a penal law whose elements must still be proved.

8. A response channel

Provide an address, email address or telephone number for payment confirmation, a written response, or a good-faith settlement proposal. If partial payment or an installment arrangement will be considered, say that any agreement must be documented in writing.

9. Signature and authority

Sign the final letter. An authorized representative should state their position or authority. Keep an identical signed copy.

Adaptable structure

Date: [date] Delivery: [personal delivery/registered mail/courier and any supplementary electronic method]

To: [complete name] Address: [complete address]

Re: Demand for [payment or specific performance]

Dear [name]:

On [date], we entered into [identify the agreement or transaction]. Under [identify the relevant provision or document], you were required to [state the obligation] on or before [due date].

I performed my corresponding obligation by [briefly describe performance and supporting document]. As of [calculation date], you have not [paid/performed], despite [briefly identify prior reminder, if any].

The amount presently due is:

Principal: ₱[amount]

Less payments or credits: ₱[amount]

Valid interest or charges through [date]: ₱[amount]

Total: ₱[amount]

Copies of [identify supporting documents] are enclosed.

I therefore formally demand that you [state the exact required act] within [number] calendar days from your receipt of this letter. Payment may be made through [secure instructions]. Please send written confirmation to [contact details].

If you dispute the amount or obligation, send your written explanation and supporting documents within the same period. If you do not comply, I may pursue the remedies available under our agreement and Philippine law.

This letter does not waive any right or remedy available to me.

Sincerely,

[signature] [printed name and, if applicable, authority]

This structure is unsuitable without modification for ejectment, dishonored checks, installment real-estate cancellation, tax assessments, labor disputes and other matters governed by special procedures.

How to serve it and preserve proof

Personal delivery

Bring two identical signed copies. Ask the recipient—or an authorized person at the address—to sign the receiving copy and write:

Their complete name;
Signature;
Date and time received;
Position or relationship to the recipient; and
Identification details, if voluntarily provided and appropriate.

The person delivering the letter should make a contemporaneous written record of when, where and to whom delivery was made. If litigation is likely, a disinterested server and a properly prepared affidavit of service may be helpful.

Registered mail

Keep:

The registry receipt;
A complete copy of the signed letter and enclosures;
The tracking record;
Postal notices;
The registry return card or other proof showing who received it and when; and
Any returned envelope and notation explaining nondelivery.

Proof that a letter was merely mailed may not establish that it was actually received. The Supreme Court has declined to treat an extrajudicial demand as effective where receipt was not established. Use the recipient’s correct and current address.

Private courier

Choose a service that records the delivery address, date, time and recipient’s name or signature. Save the waybill, tracking history, delivery confirmation and returned package, if any. Courier service is useful evidence but does not override a contract or law requiring another method.

Email or messaging application

Electronic delivery can supplement physical service, especially when the parties ordinarily transact electronically or the contract authorizes email notice. Preserve the complete message, attachments, timestamp, recipient address, transmission record and acknowledgment.

Screenshots alone may omit context or be challenged. Electronic evidence must still satisfy the Rules on Electronic Evidence, including authentication. Do not rely exclusively on email or chat when a contract, law or court rule requires personal service, registered mail, posting, notarization or actual receipt.

If acceptance is refused

Do not argue, trespass or create a confrontation. The server should record the date, time, place, persons present and what happened, then use another valid method such as registered mail.

Do not assume that leaving the letter at the door or posting it publicly is valid. Posting is allowed only in particular circumstances, including the specific Rule 70 procedure discussed below.

Situations with special requirements

Unpaid rent and ejectment

For an unlawful-detainer case by a lessor based on nonpayment or violation of lease conditions, Rule 70, Section 2 generally requires a demand both:

To pay or comply with the lease conditions; and
To vacate.

Unless otherwise stipulated, the action may be commenced after the lessee fails to comply for fifteen days in the case of land or five days in the case of buildings. Written notice may be served on a person found on the premises or posted there if no person is found. The precise application of these requirements depends on the ground for ejectment, the lease terms and how possession became unlawful. See the Supreme Court’s discussion of Rule 70 demand requirements.

Use a lawyer promptly where possession, lease expiration, tolerance, rent control or the one-year ejectment period is involved. A letter demanding only payment—or only that the occupant vacate—may be inadequate for the intended remedy.

Dishonored checks

For a potential case under Batas Pambansa Blg. 22, the drawer’s receipt of written notice of dishonor is critical. Section 2 gives the drawer five banking days after receipt to pay the holder or make arrangements for full payment before the statutory presumption described in the law may arise. The prosecution must prove the required elements beyond reasonable doubt; a civil demand and nonpayment do not automatically establish criminal liability.

Identify each check, its date, number, drawee bank, amount and reason for dishonor. Preserve the original check, bank return slip and clear proof of actual receipt. Review the text of B.P. Blg. 22 and obtain legal advice before filing a complaint.

Cancellation of installment real-estate sales

Republic Act No. 6552, commonly called the Maceda Law, imposes special buyer protections.

Where at least two years of installments have been paid, the buyer may be entitled to an earned grace period. Cancellation generally requires a notice of cancellation or demand for rescission by notarial act, thirty days after the buyer’s receipt, and payment of the applicable cash surrender value.

Where less than two years of installments have been paid, the seller must generally give a grace period of at least sixty days from the installment’s due date. If the default remains, cancellation may occur only after thirty days from the buyer’s receipt of the notarized notice of cancellation or demand for rescission.

The statute contains coverage limits and other conditions. A simple unnotarized collection letter is not a substitute for the statutory cancellation process. Consult Republic Act No. 6552.

Small claims

The Rules on Expedited Procedures in the First Level Courts cover qualifying small-claims actions solely for payment or reimbursement of money where the claim does not exceed ₱1,000,000, exclusive of interest and costs. The official filing materials call for the latest demand letter, if any, together with available proof of service and receipt.

Use the current Rules on Expedited Procedures and official court forms. Confirm territorial jurisdiction, filing fees, the claim’s eligibility and whether barangay conciliation is required.

Barangay conciliation

A demand letter does not replace mandatory Katarungang Pambarangay proceedings. Under Sections 408–412 of the Local Government Code, many disputes between individuals actually residing in the same city or municipality must first undergo barangay conciliation before a case is filed in court or another government office for adjudication.

Exceptions include certain disputes involving the government or official functions, specified offenses, parties residing in different cities or municipalities, urgent provisional remedies, detention or deprivation of liberty, and actions that may otherwise prescribe. Venue and other exceptions are fact-dependent. When applicable, obtain the proper Certificate to File Action. See Republic Act No. 7160, Sections 408–412.

Evidence to preserve

Keep one organized file containing:

The final signed letter and every enclosure;
Earlier drafts only if there is a reason to retain them;
The contract and amendments;
Invoices, statements, receipts and payment records;
Delivery, completion or acceptance evidence;
Checks and bank dishonor records;
Personal-service acknowledgment or server’s affidavit;
Registry, courier and tracking records;
Returned envelopes or packages;
Complete emails and electronic messages;
Replies, settlement proposals and acknowledgments;
A dated computation of the claim;
Proof of the sender’s performance or readiness to perform; and
A timeline of all material events.

Retain originals. Ordinarily, send copies of supporting documents rather than irreplaceable originals.

Common mistakes

Demanding from the wrong person or an incorrect corporate entity;
Using an outdated or incomplete address;
Failing to establish the sender’s own performance;
Omitting the due date or factual basis;
Stating only a lump-sum amount without computation;
Claiming unauthorized interest, penalties or attorney’s fees;
Giving an arbitrary deadline that conflicts with the contract or law;
Sending only by chat and preserving only cropped screenshots;
Proving mailing but not receipt;
Using hostile, defamatory or humiliating language;
Copying employers, relatives or social-media contacts who have no legitimate role;
Threatening arrest, public exposure or immediate seizure;
Accepting partial payment without documenting its application and effect;
Treating a demand letter as a substitute for barangay conciliation; or
Waiting until a prescriptive or ejectment deadline is about to expire.

After service

Record the date of actual receipt and calculate the deadline from that date, unless the governing contract or rule provides otherwise.

If the recipient pays, issue an appropriate receipt and state whether the payment fully or only partially settles the obligation. If the parties agree on installments, document the amount, dates, payment method, treatment of interest, consequences of default, and whether any claim is waived.

If the recipient disputes the demand, examine the supporting documents before escalating. Correct genuine accounting errors in writing. Do not alter the original letter or proof of service.

If the deadline passes without compliance, determine the correct next forum: barangay conciliation, an administrative agency, arbitration, small claims court, another civil action, or—where independently supported by law—a prosecutor’s office. The proper route depends on the claim, parties, amount, location, contract and requested remedy.

When legal help is urgent

Consult a Philippine lawyer immediately if:

A limitation or one-year ejectment period may expire soon;
The demand concerns eviction or possession of property;
A dishonored check may lead to a B.P. Blg. 22 complaint;
Real-estate installment cancellation or rescission is intended;
The contract has arbitration, foreign-law or unusual notice provisions;
The amount or property is substantial;
The other party denies the contract or alleges fraud, forgery or full payment;
There are multiple debtors, guarantors, corporations or deceased parties;
Assets may be concealed or transferred;
Injunction, attachment, replevin or another urgent provisional remedy may be needed;
The sender’s own performance is disputed; or
The recipient has threatened violence or retaliation.

Anyone facing immediate danger should prioritize personal safety and contact the appropriate authorities instead of personally serving the letter.

FAQ

Must a lawyer write or sign the letter?

Not for an ordinary private demand. The claimant may write and sign it. Legal assistance is prudent when special notice requirements, large claims, prescription, property possession or possible criminal proceedings are involved.

Must it be notarized?

Generally, no. Notarization becomes necessary when a law, contract or intended legal act requires it. Cancellation or rescission covered by the Maceda Law is an important example requiring a notarial act.

Is registered mail mandatory?

Not for every demand. Follow the contract and applicable law. Registered mail is commonly used because it can generate proof, but retain evidence of actual receipt—not merely mailing.

Can the letter be sent only by email?

Possibly, if the agreement and applicable law permit it and receipt can be proved. For important claims, use a compliant physical method as well unless competent advice confirms that electronic service alone is sufficient.

How many days should the recipient be given?

There is no universal period. Use the period stated in the contract or special law. Otherwise, give a reasonable, clearly measured period based on the required performance.

Does receiving a demand letter mean the recipient is already legally liable?

No. It states the sender’s position. Liability still depends on the agreement, evidence, defenses and applicable law.

Does silence amount to admission?

Not automatically. Preserve the silence as part of the history, but do not describe it as conclusive proof of liability.

Can the sender immediately charge legal interest?

Only when supported by the obligation and applicable law. The validity, rate and starting date of interest may depend on the contract, the type of obligation, default and court findings.

Can a demand letter stop prescription?

A written extrajudicial demand can interrupt prescription under Article 1155 of the Civil Code, but the effect and the correct period depend on the claim. It does not revive an already prescribed action. Do not postpone filing without legal advice.

Should the recipient sign the letter?

The recipient’s signature is useful as proof of receipt, not necessarily agreement with its contents. The acknowledgment should make that distinction clear if disputed.

This article provides general Philippine legal information, not legal advice or an attorney-client relationship. The correct letter and method of service depend on the contract, evidence, parties and intended remedy. Statutes, Supreme Court rules, decisions and official guidance were checked through August 4, 2026.