Signed promissory note with a pen, peso bills and a calculator on a wooden table

Is a Promissory Note Enforceable? What It Must Include

By the CivilLaw.PH Editorial Team, led by publisher Anton Sheker.

Direct answer: Yes. A promissory note signed by the borrower is an enforceable written loan contract in the Philippines, even if it is not notarized and even if it is not a “negotiable” note. Contracts bind in whatever form they are made once consent, object and cause are present (Civil Code Arts. 1318 and 1356). What the note says decides how much you can collect: interest is owed only if it is written in the note (Art. 1956), and a clear due date and default clause can spare you the need for a demand.

Related: Article 1956 explained: what happens when the interest is not written in the note, and when interest already paid can be recovered.

This guide is about drafting and checking the note itself: what it must contain, which clauses help, and which clauses courts cut down. If the borrower has already defaulted and you want to sue, see how to file a small claims case on an unpaid promissory note. If there is no note at all, see how to prove a verbal or GCash loan.

The rule at a glance

QuestionShort answerSource
Is a signed note binding?Yes, if there was consent, a definite amount and a cause (the money lent).Civil Code Arts. 1318, 1356, 1933, 1953
Must it be notarized?No. Notarization makes it a public document that is easier to prove, but it is not needed for validity.Rules of Court, Rule 132 Secs. 19–20, 23
Is interest automatic?No. Interest is due only if expressly stipulated in writing.Civil Code Art. 1956
Is a demand needed before default?Not if the note expressly says default starts on the due date without demand.Art. 1169; Rivera v. Spouses Chua
How long to sue?Ten years from the due date for a written contract; a written demand or acknowledgment interrupts the period.Arts. 1144, 1155

Why is a promissory note binding even without a lawyer or notary?

A promissory note is usually the written evidence of a simple loan (mutuum). The lender delivers money, the borrower becomes its owner and must pay back an equal amount (Arts. 1933 and 1953). A contract exists once there is consent, a certain object and a cause (Art. 1318), and it is obligatory “in whatever form” it was entered into, unless a law requires a special form for validity (Art. 1356). No law requires a loan of money to be notarized.

Art. 1358 does say that contracts involving more than ₱500 “must appear in writing, even a private one.” Under Art. 1357, though, that kind of form rule only lets the parties compel each other to put the agreement in writing; it does not void an oral loan. A signed note simply satisfies the rule from the start.

Notarized or not? A document acknowledged before a notary public is a public document; everything else is private (Rule 132, Sec. 19). If the borrower denies signing a private note, you must prove its due execution, for example by a witness who saw it signed or by proof of the handwriting (Sec. 20). A notarized note is evidence even against third persons of the fact that gave rise to it and of its date (Sec. 23). Notarizing is worth it for large loans, but an unnotarized note is still enforceable.

In Rivera v. Spouses Chua (G.R. No. 184458, January 14, 2015), the borrower claimed his signature on an unnotarized note was forged. The Supreme Court upheld the note: forgery must be proved by clear, positive and convincing evidence, and a bare denial could not beat the lender’s testimony and an NBI handwriting examiner’s findings.

Does it matter whether the note is “negotiable”?

Only for transfers and certain technical rules. Under the Negotiable Instruments Law (Act No. 2031), a note is negotiable only if it is written and signed by the maker, contains an unconditional promise to pay a sum certain in money, is payable on demand or at a fixed or determinable future time, and is payable to order or to bearer (Secs. 1 and 184).

Most personal notes say “I promise to pay Juan dela Cruz,” not “to the order of Juan dela Cruz,” so they are not negotiable. That does not make them weak. In Rivera, the Court held that a note made out to specific persons was not a negotiable instrument, yet the borrower was “still liable under the terms of the Promissory Note that he issued.” Use “to the order of” only if the lender may want to transfer the note to someone else.

What should a promissory note include?

Use this checklist when drafting a note or checking one you were asked to sign.

ClauseWhat to writeWhy it matters
PartiesFull names, addresses and a government ID number of the borrower and lender.Identifies who owes whom; helps with service of court papers and barangay venue.
AmountThe principal in words and figures, and an acknowledgment that it was received.For negotiable notes, words prevail over figures if they differ (NIL Sec. 17(a)); the receipt line answers a “no money was given” defense.
Due dateA fixed date, or fixed installment dates.An obligation with a day certain is demandable when that day comes (Art. 1193).
InterestA specific rate and period, e.g. “1% per month from [date].”No written stipulation, no interest (Art. 1956); only 6% a year legal interest as damages from default (Art. 2209; BSP MB Circular No. 799, applied from July 1, 2013 in Nacar v. Gallery Frames).
Default clause“Failure to pay on the due date places me in default without need of demand.”Demand is unnecessary only when the obligation expressly so declares (Art. 1169(1)).
Acceleration clauseIf any installment is unpaid, the whole balance becomes due.Without it, only installments already due can be collected (see Art. 1198 for when the law itself ends the period).
Penalty and attorney’s feesA moderate late-payment charge and a reasonable attorney’s-fee clause.Fees are recoverable when stipulated (Art. 2208), but courts can reduce iniquitous penalties (Art. 1229).
Co-borrowers“We jointly and severally (solidarily) promise to pay.”Solidarity is never presumed; it must be expressly stated (Art. 1207).
Signatures and dateSignature of every borrower and co-maker, date and place; witnesses or notarization for large amounts.Proves due execution if the signature is later denied (Rule 132 Sec. 20).

Collateral and guarantors. If someone else promises to pay if the borrower does not, that promise must be in writing and signed by that person (Art. 1403(2)(b)). Whether that person is a mere guarantor or a surety who is liable right away depends on the wording; see guaranty vs suretyship. A mortgage on land needs its own notarized and registered document, not just a line in the note.

Why is the default clause so important?

As a rule, a debtor is in delay only from the time the creditor demands payment (Art. 1169). One exception is when “the obligation … expressly so declare[s].” In Rivera, the Court stressed that it is not enough for the note to fix a due date; it “must further state expressly that after the period lapses, default will commence.” Because Rivera’s note made interest run “from the date of default” after a fixed date, he was in default the day after the due date, without any demand.

Even with such a clause, sending a written demand later is still wise: it interrupts prescription (Art. 1155) and is usually needed anyway before barangay conciliation or court. See when a debtor is in delay or default.

Which clauses can a court strike down or reduce?

Parties may agree on any terms that are not contrary to law, morals, good customs, public order or public policy (Art. 1306). These clauses are the usual problem areas.

ClauseRiskAuthority
Very high interest (e.g. 5% a month)May be voided as unconscionable and replaced with legal interest.Rivera: 5% a month (60% a year) replaced with legal interest of 12% a year to June 30, 2013 and 6% from July 1, 2013
Heavy penalty on top of interestReduced if iniquitous or if the debt was partly paid.Art. 1229
Large attorney’s-fee percentageMay be reduced to a reasonable amount.Rivera: 20% clause; ₱50,000 awarded
“I will pay when I am able”Not void; treated as a period the court will fix, which means an extra court step.Arts. 1180, 1197
Payment “only if I decide to”A condition that depends solely on the debtor’s will is void.Arts. 1182, 1308
Interest agreed orally onlyNot collectible as interest.Art. 1956

For how courts measure excessive rates, see when courts reduce unconscionable interest; for the 6% legal rate and when it runs, see legal interest on unpaid debt.

What defenses can a borrower raise against a note?

  • Forged signature. Must be proved by clear, positive and convincing evidence; mere variance in signatures is not enough (Rivera).
  • Payment. Keep receipts and bank or e-wallet records; if the debt earns interest, payments go first to interest (Art. 1253).
  • No money was actually received. A negotiable note is presumed issued for value (NIL Sec. 24), and a receipt clause in any note makes this defense harder.
  • Unconscionable interest or penalty. Asks the court to reduce, not erase, the debt (Art. 1229; Rivera).
  • Prescription. More than ten years from the due date with no written demand or acknowledgment in between (Arts. 1144, 1155).

Your options and what to do next

If you are lending money now:

  1. Transfer the money by bank or e-wallet, or get a signed receipt, so delivery can be proved.
  2. Draft the note with every clause in the checklist above; keep interest and penalties moderate.
  3. Have all borrowers and co-makers sign each page; add two witnesses, and notarize for large amounts.
  4. Keep the original in a safe place and give the borrower a copy. Documentary stamp tax may apply to promissory notes; check current rates with the BIR.

If the borrower has not paid:

  1. Compute what is due under the note’s interest and default clauses.
  2. Send a written demand with a firm deadline, by a method you can prove. It interrupts prescription (Art. 1155).
  3. Go to the barangay if you and the borrower are individuals living in the same city or municipality; you will need a Certificate to File Action if no settlement is reached. See barangay conciliation and the certificate to file action.
  4. File in court. Most personal loans fit small claims, where lawyers do not appear at the hearing; confirm the current ceiling on the Supreme Court website and follow our small claims guide for promissory notes. Larger or more complex claims go through a collection of sum of money case.
  5. Watch the deadline: ten years from the due date on a written note (Art. 1144).

If you are the borrower: read the interest, penalty and acceleration clauses before signing and strike out terms you did not agree to. If you are sued, keep proof of every payment, raise unconscionable interest or penalties in your answer, and propose a written payment plan at the barangay stage. Low-income parties may ask the Public Attorney’s Office for help.

Documents to keep: the original signed note, proof the money was released (bank, GCash or Maya records, receipt), IDs of the parties, payment records, the demand letter with proof of delivery, and any messages acknowledging the debt.

First action today: take out the note and check four things: a fixed due date, a written interest rate, an express “default without demand” clause, and every borrower’s signature. If any is missing, have the borrower sign an amended or acknowledgment document while relations are still good.

Key takeaways

  • A signed promissory note is enforceable without notarization (Arts. 1318, 1356).
  • A note does not have to be negotiable to be collected (Rivera v. Spouses Chua).
  • Interest must be written in the note, or none is due as interest (Art. 1956).
  • Write an express default clause if you want default without demand (Art. 1169).
  • Co-borrowers are liable for the whole debt only if the note says so (Art. 1207).
  • Courts reduce unconscionable interest, penalties and attorney’s fees (Art. 1229; Rivera).

Frequently asked questions

Is a handwritten promissory note valid?

Yes. The law does not require a typed or printed form. What matters is that the borrower signed it and that its terms are clear. If the signature is later denied, you will need to prove it is genuine (Rule 132, Sec. 20).

Can I charge any interest rate I want?

You may agree on a rate in writing, but courts can void a rate they find unconscionable. In Rivera, 5% a month was struck down and replaced with legal interest. Keep rates moderate and explain them in the note.

What if the note has no due date?

If no period is fixed and none was intended, the debt is demandable at once (Art. 1179), and delay starts from your demand (Art. 1169). If a period was intended but not fixed, or payment was left to “when able,” the court may fix the period (Arts. 1180, 1197).

Is a note signed electronically enforceable?

Electronic documents and signatures can have legal effect under the E-Commerce Act (RA 8792), but they raise proof questions. See how to prove a loan made through chats or GCash.

Sources

Sources rechecked as of: October 15, 2026

This article is general legal information, not legal advice. For advice on your specific note or loan, consult a lawyer or the Public Attorney’s Office.