In short
The two articles closing the chapter on management of another’s affairs answer the two money questions: what the person who stepped in answers for, and what the owner owes them. Article 1518 starts with the obvious: the manager must indemnify the damage that, through its fault or negligence, is caused to the one for whose benefit it should have acted. It adds an exemption: it is exempt from liability where it performs acts that, in keeping with the duty of assistance it has and given the circumstances, could foreseeably redound to a third party’s benefit. And then it raises the bar sharply in four situations, because in them the manager answers even for fortuitous event: if it acts against the interested party’s express prohibition, unless that prohibition is contrary to law, morals or public order; if it carries out risky operations a prudent and reasonable person would not normally have carried out; if it subordinates the interest it manages to its own; or if it lacks the aptitudes necessary for the business, or its intervention prevented that of a more suitable person. That said, the article itself carries the way out of all four: unless the management was useful to the interested party. Article 1519 looks the other way. If the interested party takes advantage of the management’s benefits, even without having ratified it, they are liable for performing the obligations contracted in their name before third parties; for reimbursing the manager the expenses or losses it had and the damage it suffered in discharging its task, provided these do not exceed the benefit received; and for remunerating the manager, if the management corresponds to the exercise of its professional activity, or if the remuneration is equitable in the circumstances of the case. That cap of the benefit received has a written exception: the same reimbursement obligation applies where the management aimed to avoid some imminent and manifest harm, even if no usefulness resulted from it.
What is it?
They are Articles 1518 and 1519 of the Civil Code of 2020: what the manager of another’s affairs answers for, when it answers even for fortuitous event, and what the interested party who benefits owes it.
Who can do it?
Managers of another’s affairs and interested parties whose affairs were managed, under the Puerto Rico Civil Code.
Requirements
- The manager indemnifies the damage its fault or negligence causes to the one for whose benefit it should have acted.Verified against the official source
- It answers even for fortuitous event in the four situations of Article 1518, unless the management was useful to the interested party.Verified against the official source
- If the interested party takes advantage of the management’s benefits, even unratified, they must reimburse expenses, losses and damage without exceeding the benefit received.Verified against the official source
- That reimbursement is owed all the same where the management aimed to avoid imminent and manifest harm, even if no usefulness resulted.Verified against the official source
Documents you need
Cost
Step by step
Step 1: The base rule: fault or negligence
Article 1518, first sentence: the manager must indemnify the damage that, through its fault or negligence, is caused to the one for whose benefit it should have acted.
Step 2: An exemption the Code writes separately
Second sentence: it is exempt from liability where it performs acts that, in keeping with the duty of assistance it has and given the circumstances, could foreseeably redound to a third party’s benefit. The Code does not define that duty of assistance here, and this guide does not define it for it.
Step 3: Four situations where you answer even for fortuitous event
The article raises the bar and makes the manager answer for fortuitous event in four situations. It is a harsher liability than the ordinary one, and worth knowing before stepping in.
Step 4: Against the owner’s express prohibition
Subsection (a): if it acts against the interested party’s express prohibition, unless that prohibition is contrary to law, morals or public order. The proviso matters: an unlawful prohibition does not protect whoever imposed it.
Step 5: Risky operations
Subsection (b): if it carries out risky operations a prudent and reasonable person would not normally have carried out. The measure is the same prudent and reasonable person the chapter uses for diligence.
Step 6: Putting your own interest first
Subsection (c): if it subordinates the interest it manages to its own. Managing another’s affair while tending to one’s own first aggravates the liability.
Step 7: Not being up to it, or displacing someone who was
Subsection (d): if it lacks the aptitudes necessary for the business, or its intervention prevented that of a more suitable person. Two distinct situations in one subsection.
Step 8: The way out of all four: that it was useful
The article says it before the list: it answers for fortuitous event, unless the management was useful to the interested party. If the management served, that aggravated liability does not kick in even where one of the four situations occurs.
Step 9: What the owner who benefits owes
Article 1519, opening: if the interested party takes advantage of the management’s benefits, even without having ratified it. Benefiting suffices; ratification is not needed to become liable.
Step 10: First: what was contracted in their name
Subsection (a): perform the obligations contracted in their name before third parties. The third parties the manager contracted with are not left hanging.
Step 11: Second: expenses, losses and damage, with a cap
Subsection (b): reimburse the manager the expenses or losses it had and the damage it suffered in discharging its task, provided these do not exceed the benefit received. The cap is the benefit, not the expense.
Step 12: And the exception to the cap
The same subsection: the same obligation applies where the management aimed to avoid some imminent and manifest harm, even if no usefulness resulted from it. Whoever acts to avert imminent harm recovers their expenses even if nothing was achieved.
Step 13: Third: remuneration, in two cases
Subsection (c): remunerate the manager if the management corresponds to the exercise of its professional activity, or if the remuneration is equitable in the circumstances of the case. The Code does not say how that equitable remuneration is computed, and this guide does not fix it.
Where to do it
The Code names no agency for this chapter. Claims for reimbursement, remuneration or damages between manager and interested party are decided by the Court of First Instance.
How long it takes
What to do if something goes wrong
If the interested party ratified the management, the Code sends the relationship to mandate and there the reimbursement and remuneration rules are different, with their own guides. If the owner had asked you from the start, this figure does not apply either. If what you want to know is what obligations you had while managing — notifying, continuing, rendering accounts — they are in the chapter’s two previous articles, with their own guide. These articles fix no amounts, do not define the duty of assistance, do not say who measures the benefit received, and do not say how the equitable remuneration is computed. MiPRFácil does not represent anyone in court and gives no legal advice.
Common mistakes
- Managing against the interested party’s express prohibition and expecting ordinary liability.
- Forgetting that in the four situations of Article 1518 one answers even for fortuitous event.
- Overlooking the written way out: that the management was useful to the interested party.
- Undertaking risky operations a prudent and reasonable person would not have.
- Tending to your own interest first while managing another’s.
- Stepping into a business without the necessary aptitudes, or displacing someone more suitable.
- Believing that without ratification the owner owes nothing: benefiting from it suffices.
- Claiming beyond the benefit received, outside the imminent and manifest harm case.
- Not documenting the expenses, the losses or the benefit the management produced.
- Taking remuneration for granted: it is owed only if the management is of your professional activity or if it is equitable in the case.
Frequently asked questions
I handled someone else’s affair and it went badly. Do I answer?
Article 1518 requires indemnifying damage caused by fault or negligence, and in four situations makes the manager answer even for fortuitous event, unless the management was useful to the interested party.
The owner ratified nothing but benefited. Do they pay me?
Article 1519 requires the interested party who takes advantage of the management’s benefits, even unratified, to reimburse expenses, losses and damage, provided they do not exceed the benefit received.
I acted to avert harm and it achieved nothing. Do I recover?
Article 1519(b) says the same reimbursement obligation applies where the management aimed to avoid some imminent and manifest harm, even if no usefulness resulted from it.
Do I get paid for the work, not just expenses?
Article 1519(c) requires remunerating the manager if the management corresponds to the exercise of its professional activity, or if the remuneration is equitable in the circumstances of the case.
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
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You took on someone else’s affair uninvited: you cannot just drop it
Article 1517 requires the manager to notify without delay and to continue until the interested party can take over, ratify or entrust it to another.
What you owe whoever acts for you: pay, expenses, and accounts in 30 days
A mandate is presumed paid. And if you do not protest the final accounts within thirty days of their rendering, they are deemed accepted.
Carelessness, bad faith or bad luck: who answers for what
With no agreed standard, that of a prudent and reasonable person applies. Waiving the action for wilful breach is void.
What is claimed when someone breaches: loss suffered and gain not made
A good-faith debtor answers for what was foreseeable at contracting; one who breaches wilfully, for everything. On money debts, interest.
Acting for another: the mandatary’s eleven duties and two rights
Execute personally, follow instructions, disclose conflicts and render accounts. And they may retain the goods with preference until paid.
What an obligation is and where it comes from
Six sources, and the list stays open. Whoever performs knowing they were not bound cannot demand it back.