In short
The four articles closing the chapter on the unilateral declaration of will answer how long a public promise lasts and how it is withdrawn. Article 1532 fixes the duration: a public promise with no validity period fixed by the promisor or imposed by the promise’s nature or purpose keeps its force as long as it is not revoked. Note the period may come from two places: from what the promisor says, or from the promise’s own nature or purpose. Article 1533 governs the withdrawal, and distinguishes: if the public promise has no validity period, the promisor may revoke it at any moment; if a period was set, they may only revoke the offer for just cause and while it has not expired. Its second paragraph sets two limits that hold in both cases. The first is one of form: the revocation is only effective if it is made public in the same form as the promise or in an equivalent form; withdrawing it quietly does not withdraw it. The second is the one that most protects whoever already acted: it is not opposable to whoever has performed the act or verified the foreseen situation before the first act of publicity of the revocation. If you complied before they began publishing the withdrawal, the withdrawal does not reach you. Article 1534 treats contests separately: the promise of a prestation as a contest prize is only valid if the public announcement fixes a period for its performance; the promisor has the right to designate the person who is to decide to whom the reward is awarded, and failing that designation it falls to the promisor; in both cases, the decision is binding. And Article 1535 extends the public reward rules to other unilateral declarations of will, save where by their particular nature their application proves inadequate, in the judgement of the courts.
What is it?
They are Articles 1532 to 1535 of the Civil Code of 2020: how long a public promise lasts, how and when it may be revoked, what a contest prize requires and to what other declarations these rules apply.
Who can do it?
Whoever made a public promise and wants to withdraw it, and whoever complied or wants to comply with what was announced, under the Puerto Rico Civil Code.
Requirements
- With no validity period, the public promise keeps its force as long as it is not revoked.Verified against the official source
- With no period, the promisor may revoke at any moment; with a period set, only for just cause and while it has not expired.Verified against the official source
- The revocation is only effective if it is made public in the same form as the promise or in an equivalent form.Verified against the official source
- The revocation is not opposable to whoever performed the act or verified the foreseen situation before its first act of publicity.Verified against the official source
- The promise of a prestation as a contest prize is only valid if the public announcement fixes a period for its performance.Verified against the official source
Documents you need
Cost
Step by step
Step 1: With no period, it holds until withdrawn
Article 1532: a public promise with no validity period keeps its force as long as it is not revoked. It does not lapse on its own with time.
Step 2: The period may come from the promise itself
The same article speaks of the period fixed by the promisor or imposed by the promise’s nature or purpose. The second source is overlooked: some promises have a purpose that marks their own end.
Step 3: With no period: it may be revoked whenever
Article 1533, first sentence: if the public promise has no validity period, the promisor may revoke it at any moment.
Step 4: With a period: only for just cause and before it expires
Second sentence: if a period was set, the promisor may only revoke the offer for just cause and while it has not expired. Two conditions at once. The Code does not define just cause here.
Step 5: Withdrawing it quietly does not withdraw it
Second paragraph: in any case, the revocation is only effective if it is made public in the same form as the promise or in an equivalent form. It is announced as it was announced. The Code does not say what makes a form equivalent, and this guide does not define it.
Step 6: And if you already complied, it does not reach you
Closing of 1533: it is not opposable to whoever has performed the act or verified the foreseen situation before the first act of publicity of the revocation. The deciding date is the first act of publicity, not the last.
Step 7: Contests need a period to be valid
Article 1534: the promise of a prestation as a contest prize is only valid if the public announcement fixes a period for its performance. With no announced period, the Code denies it validity.
Step 8: Who decides who wins
The same article: the promisor has the right to designate the person who is to decide to whom among the contestants the reward is awarded; failing that designation, it falls to the promisor.
Step 9: And that decision is binding
Closing of 1534: in both cases, the decision is binding. It makes no difference whether the designee or the promisor decided: the Code makes it binding.
Step 10: These rules reach other declarations
Article 1535: the provisions on the public promise of reward are applicable to other unilateral declarations of will, save where by their particular nature their application proves inadequate, in the judgement of the courts. The assessment is expressly left to the courts.
Step 11: What these articles do not carry
They do not define just cause for revoking, do not say what makes a publicity form equivalent, do not say what happens to a contest announced with no period beyond denying it validity, and fix no fee or claiming period.
Where to do it
The claim runs against whoever made the promise; the Code names no agency for this chapter. It is decided by the Court of First Instance, to which Article 1535 expressly refers for assessing whether these rules prove inadequate to another unilateral declaration.
How long it takes
What to do if something goes wrong
If what you want to know is from when the promise binds and who may demand it, that is in the chapter’s four previous articles, with their own guide. If the reward comes from a government agency programme, that programme has its own rules and guides on this site. If there was negotiation and agreement between the parties, it is a contract and not a unilateral declaration. These articles do not define just cause, do not say which publicity form is equivalent, and set no claiming period. MiPRFácil does not represent anyone in court and gives no legal advice.
Common mistakes
- Treating as withdrawn a reward not publicly revoked in the same or an equivalent form.
- Believing the revocation reaches whoever already complied: it is not opposable to whoever performed the act before its first act of publicity.
- Counting from the last act of publicity of the revocation instead of the first.
- Revoking a promise with a set period without just cause, or after it expired.
- Assuming a promise with no period lapses on its own: it holds as long as it is not revoked.
- Forgetting the period may also be imposed by the promise’s nature or purpose.
- Announcing a contest prize without fixing a period for its performance: Article 1534 denies it validity.
- Disputing the judge’s or promisor’s decision in a contest: the Code declares it binding.
- Not documenting when you performed the act or the foreseen situation was verified.
Frequently asked questions
Can an already announced reward be withdrawn?
Article 1533 allows it at any moment if the promise has no validity period; if a period was set, only for just cause and while it has not expired.
I had already complied when they withdrew it. Do I lose the reward?
Article 1533 says the revocation is not opposable to whoever has performed the act or verified the foreseen situation before its first act of publicity.
Is it enough that they stop mentioning it?
No. Article 1533 says the revocation is only effective if it is made public in the same form as the promise or in an equivalent form.
A contest announced a prize but no deadline. Is it valid?
Article 1534 says the promise of a prestation as a contest prize is only valid if the public announcement fixes a period for its performance.
Official sources
These are the government pages this guide is based on.
- Poder Judicial de Puerto Rico
Poder Judicial
bvirtualogp.pr.gov
Last verified
September 10, 2026
MiPRFácil is an independent informational website and is not affiliated with, endorsed by, or operated by the Government of Puerto Rico or any government agency.
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