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Work & Unemployment

A work accident caused by a third party

Last reviewed: August 31, 2026VerifiedFondo del Seguro del Estado

In short

The State Insurance Fund’s compensation is the only remedy against the employer that insured its workers, but that does not cover a third party. Article 29 of Act 45-1935 says that where the injury, occupational disease or death arose from circumstances making a third party responsible, the worker or their beneficiaries may claim damages within the year following the date the Administrator’s resolution became final. Off that same date another clock runs: during the first ninety days the Administrator may subrogate and sue the third party in your name, and during that period you may neither sue nor settle. If the Administrator sues, you are a party to the suit, it must notify you in writing within five days of the action being started, and whatever is recovered in excess of the case’s expenses is handed to you. If the Administrator does not sue, you are completely free to do so for your own benefit and with no obligation to reimburse the Fund the expenses incurred. No settlement with the third party within those ninety days stands without first satisfying the Fund’s expenses, and no extrajudicial settlement by the Administrator affects your rights without your express agreement.

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What is it?

It is the route Act 45-1935 leaves open when the one who caused your work injury was not your employer but another person or company: the driver who hit you while you were making a delivery, another company’s contractor on the same site, the maker of a defective piece of equipment. Against the insured employer the Fund’s compensation is the only remedy. Against the responsible third party it is not: you can claim damages in court. The Act organises that claim around a date — when the Administrator’s resolution became final — and gives the Fund the first chance to sue by subrogation.

Who can do it?

It applies to the injured worker or employee, and to their beneficiaries in case of death, where the injury, occupational disease or death giving right to compensation under this Act arose from circumstances making a third party responsible. The practical condition is that the Fund be obliged to compensate or provide treatment in your case, because that is where the Administrator’s subrogation right is born and it is from the finality of its resolution that the terms run. The Act does not define who counts as a third party beyond that formula, nor does it exclude any category of third party by name.

Requirements

  • The right arises where the injury, occupational disease or death came about under circumstances making a third party responsible, in cases where the Fund is obliged to compensate in some form or to provide treatment (Article 29).Verified against the official source
  • The worker or their beneficiaries may claim and obtain damages from the responsible third party within the year following the date the Administrator’s resolution of the case became final (Article 29).Verified against the official source
  • The worker may not file suit nor settle any cause of action against the responsible third party until ninety (90) days have passed from the Administrator’s resolution becoming final and enforceable (Article 29).Verified against the official source
  • The Administrator may subrogate in your rights and bring proceedings against the third party in your name within those same ninety (90) days, and must notify you in writing within five (5) days of the action being started (Article 29).Verified against the official source
  • If the Administrator fails to sue the third party, the worker or their beneficiaries are completely free to bring the suit for their own benefit, without being obliged to reimburse the Fund the expenses incurred in the case (Article 29).Verified against the official source
  • No settlement between the worker and the third party within the ninety (90) days, or after that term if the Administrator already filed suit, has value or legal effect unless the expenses incurred by the Fund are satisfied first (Article 29).Verified against the official source

Documents you need

Cost

Check the current cost with the official agency.

Step by step

  1. Step 1: Why the third party can be sued

    Article 18 says that when the employer insures its workers under this Act, the right to obtain compensation shall be the only remedy against the employer, even where the maximum compensation or benefits were granted. That exclusivity belongs to the employer and to no one else. Article 29 opens the other door: in cases where the injury, occupational disease or death giving right to compensation came about under circumstances making a third party responsible for that injury, disease or death, the injured worker or their beneficiaries may claim and obtain damages from the responsible third party. Collecting from the Fund does not cancel that right: it puts it on a calendar.

  2. Step 2: The date everything hangs from

    It is not the date of the accident nor of the medical discharge: it is the date the Administrator’s resolution of your case became final and enforceable. The article’s two terms come off it. One is yours: you may claim and obtain damages from the responsible third party within the year following that date. The other is the Fund’s: within the ninety days following that same date the Administrator may subrogate in your rights and bring proceedings against the third party in your name. Since the article itself forbids you to sue or settle until those ninety days have passed, what is left of the year after day ninety is the window in which you can act on your own. That is arithmetic on the two terms, not a separate rule, but it is worth being clear about before the year runs out.

  3. Step 3: If the Fund sues the third party

    The Administrator subrogates in your rights and brings the proceeding in your name. Three things protect you inside that suit. First, you are a party: the article says the worker or their beneficiaries shall be a party in every proceeding the Administrator establishes under these provisions. Second, they must tell you: it shall be the Administrator’s obligation to notify you in writing of that proceeding within five days of the action being started. Third, the money left over is yours: any sum obtained as a result of the action, or by judicial or extrajudicial settlement, in excess of the expenses incurred in the case shall be delivered to the injured worker or the beneficiaries entitled to it. What the Administrator recovers for the Fund goes in for the benefit of the particular group in which the occupation or industry you worked in was classified.

  4. Step 4: If the Fund does not sue

    This is the paragraph most worth knowing and the least known. If the Administrator fails to file suit against the responsible third person, the worker or their beneficiaries shall be completely free to bring that suit for their own benefit, without being obliged to reimburse the State Insurance Fund for the expenses incurred in the case. Read it twice: no obligation to return to the Fund what it spent on your treatment and your compensation. That waiver does not appear where the Administrator did sue, nor where you settle early; it is specific to the situation where the Fund let its chance pass.

  5. Step 5: Settlements, in both directions

    The Act protects the Fund from having its reimbursement settled away underneath it, and protects you from the Fund settling over your head. On the Fund’s side: no settlement between the injured worker or their beneficiaries and the responsible third party, within the ninety days following the decision becoming final, or after that term has expired if the Administrator has filed its suit, shall have value or legal effect unless the expenses incurred by the Fund are satisfied first; and no judgment shall be entered in suits of this nature, nor any settlement approved, without express reservation of the Fund’s right to reimbursement of all expenses incurred. The clerk of the court hearing the case must notify the Administrator of any order affecting the parties’ rights and of the final disposition. On your side: the Administrator may settle its rights against the third party, but no extrajudicial settlement may affect your rights or your beneficiaries’ without your express agreement or approval.

  6. Step 6: Your rights under this Act cannot be assigned or attached

    Article 30 says the rights and actions born of this Act may not be negotiated, transferred or assigned, nor be the object of attachment or third-party claims, and that no judge shall authorise any order to such ends. There is one exception and it runs the other way: the Administrator shall deduct for reimbursement, from any of the benefits you are entitled to under this Act, the payments made to you under another government insurance programme. That deduction is made upon presentation of an invoice certified by the Director of the office, bureau or agency administering that programme, and never for an amount exceeding the balance of the benefits you are entitled to at the moment of liquidation.

  7. Step 7: What a lawyer costs under this Act

    Article 33 is worth knowing because it changes the arithmetic. Workers do not need to appear assisted by a lawyer before the Fund Administrator or the Industrial Commission for the handling, liquidation or resolution of their cases. If they choose to obtain a lawyer’s services, the Industrial Commission fixes the percentage to be paid, charged to the State Insurance Fund. In cases under review before the courts and in mandamus cases authorised by this Act, the court fixes the fees the lawyer should equitably receive, also charged to the Fund. And the last paragraph closes it: the fees fixed by the Industrial Commission or the court shall be the only ones the lawyer providing services may receive. The damages suit against the third party, by contrast, is an ordinary civil suit and this Act fixes no fees for it.

  8. Step 8: Meanwhile, your treatment is still the Fund’s

    A responsible third party existing does not take you out of the compensation system. Article 5 keeps the obligation: during the period of incapacity the injured worker shall let themselves be treated and examined by a competent physician designated by the Administrator, and if the Administrator does not provide adequate assistance, the worker may go before the Industrial Commission, which after investigation by a physician designated for the purpose shall order the assistance the case requires, and the Administrator shall comply with the order. The same article recognises your right to designate a physician or surgeon at your own expense to witness your examination or to treat you. And if you disagree with the Administrator’s decision on your case, Article 9 gives you thirty days to appeal to the Industrial Commission from being notified with a copy of the decision.

Where to do it

The claim against the responsible third party is a civil suit and goes to court. The subrogation, the five-day notice and the reimbursement reservation are handled by the Administrator of the State Insurance Fund Corporation. If what you want is to challenge the Administrator’s own resolution on your case — and remember it is its finality that starts this article’s clocks — the forum is the Industrial Commission, a separate agency. The Act publishes no addresses, telephones, forms or portals, and we do not guess government internet addresses.

How long it takes

Check the current processing time with the official agency.

What to do if something goes wrong

What we did not read and therefore do not publish: the regulations of the State Insurance Fund Corporation and of the Industrial Commission; Articles 2 and 3 in full, which define coverage and the computation of compensation; and the Rules of Civil Procedure and the Civil Code provisions on extracontractual liability, which are what actually govern how a damages suit is litigated. Of those we report nothing. Five gaps in the text, said plainly. First, the Act does not say how you are notified that the Administrator’s resolution became final and enforceable, which is precisely the date both terms depend on. Second, it sets no term for the Administrator to tell you whether it will sue: it only gives it ninety days to do so. Third, it does not explain what happens if the Administrator sues on day eighty-nine. Fourth, it does not define who counts as a responsible third party beyond the article’s formula. Fifth, it does not publish how the expenses incurred in the case — the ones that must be satisfied to the Fund before settling — are computed. That is why cost and time are unverified: this Act imposes no charge on the worker by this route, but neither does it publish processing terms.

Common mistakes

  • Counting the year from the day of the accident: it runs from when the Administrator’s resolution became final, not from the accident nor from the discharge.
  • Suing the third party before the ninety days pass: the article expressly forbids it until that term elapses.
  • Settling with the third party within the ninety days without satisfying the Fund’s expenses: that settlement has no value or legal effect.
  • Believing that collecting from the Fund cancels your right against the third party: Article 18 makes compensation exclusive only as against the insured employer.
  • Thinking that if the Fund sues you are out of the suit: you are a party, and must be notified in writing within five days of the action being started.
  • Believing you must always return to the Fund what it spent: if the Administrator failed to sue, you are free of reimbursing those expenses.
  • Expecting the Fund to tell you if it decides not to sue: the Act only imposes notice when it does sue.
  • Accepting an extrajudicial settlement by the Administrator with the third party without your express agreement: the Act says it cannot affect your rights.
  • Assuming you can assign or pledge your claim under this Act: Article 30 forbids it and denies judges the power to authorise orders to that end.
  • Forgetting that what you collected under another government insurance programme is deducted, upon a certified invoice from that programme’s director.
  • Letting the year run out waiting for the Fund to decide: the year is yours and runs from the same date.
  • Paying a lawyer separate fees for the case before the Industrial Commission: those fixed by the Commission or the court are the only ones they may receive.

Frequently asked questions

Can I sue whoever injured me if the Fund already treated me?

Yes, if it is a third party and not your insured employer. Article 29 lets you claim and obtain damages from the responsible third party within the year following the Administrator’s resolution becoming final. Article 18’s exclusivity protects the employer that insured its workers, not the third party.

From when do I count the year?

From the date the Administrator’s resolution of your case became final. Not from the accident nor from the medical discharge. The ninety-day wait hangs off that same date.

Why can’t I sue right away?

Because Article 29 gives the Administrator ninety days from the resolution becoming final to subrogate in your rights and sue the third party in your name, and during that period the worker may neither file suit nor settle any cause of action against the responsible third party.

If the Fund sues, do I get any of the money?

Yes. Any sum obtained by the action or by judicial or extrajudicial settlement in excess of the expenses incurred in the case is delivered to you or your beneficiaries. You are also a party to that proceeding and the Administrator must notify you in writing within five days of the action being started.

And if the Fund does not sue the third party?

You are completely free to bring the suit for your own benefit, and the article adds something important: without being obliged to reimburse the State Insurance Fund for the expenses incurred in the case.

Can I reach a settlement with the third party on my own?

Not within the ninety days, nor after that term if the Administrator already filed suit, unless the expenses incurred by the Fund are satisfied first. The Act adds that no judgment shall be entered and no settlement approved without express reservation of the Fund’s right to reimbursement.

Can the Fund settle for me without consulting me?

The Administrator may settle its own rights against the responsible third party, but the Act is express: no extrajudicial settlement may affect the rights of the worker or their beneficiaries without their express agreement or approval.

Official sources

These are the government pages this guide is based on.

Last verified

August 31, 2026

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