Skip to content
MiPRFácil
Family

How to file a legitimation when parents marry after the birth

Last reviewed: August 13, 2026VerifiedSalud

In short

Legitimation takes place when the registrant’s biological parents marry after the birth of the person to be legitimated. The Demographic Registry asks for photo identification of both parents, identification of the person being legitimated, completion of the legitimation application, and a $10.00 internal revenue stamp. If the marriage took place outside Puerto Rico you must present the marriage certificate, and if the person to be legitimated is also a minor, you must complete Form RD-232, Paternity Recognition. It is done only at the Central Office in San Juan.

External link

Go to the official site

You'll leave MiPRFácilOpens in a new tab

www.salud.pr.gov

What is it?

The Demographic Registry defines it citing Article 122 of the Puerto Rico Civil Code (31 LPRA sec. 442): legitimation takes place when the registrant’s biological parents marry after the birth of the person to be legitimated. In other words, the triggering fact is the parents’ marriage after the child’s birth, not a declaration of paternity. That is why it is a different process from recognition, even though both end up touching the birth certificate and even though in one scenario the Registry requires both.

Who can do it?

It applies when the registrant’s biological parents marry after their birth. The Registry contemplates that the person being legitimated may be of legal age: in that case it asks for a letter of acceptance, and a sworn statement if they do not appear in person. And it contemplates a marriage performed outside Puerto Rico, which adds requirements. If your case does not fit — for example, if the father has never recognized the child and there is no marriage involved — what applies is probably a paternity recognition, a different process at a different price.

Requirements

Documents you need

Cost

A $10.00 internal revenue stamp. It is worth comparing: a paternity recognition costs $20.00 within 90 days and $35.00 after, so if your situation is genuinely a legitimation — the biological parents married after the birth — the correct process is also the cheaper one.

Verified against the official source · August 13, 2026

Step by step

  1. Step 1: Confirm yours is a legitimation and not a recognition

    Legitimation is triggered by a specific fact: the biological parents marrying after the birth. If that marriage exists, this is your process and it costs $10.00. If there is no marriage involved and what is needed is for the father to admit paternity, that is a recognition, with a different procedure and a cost of $20.00 or $35.00 depending on elapsed time.

  2. Step 2: If they married outside Puerto Rico, get the marriage certificate

    The Registry asks for it expressly in that case. If the marriage was in Puerto Rico, the Registry already has the record; if it was elsewhere, it must be supplied, and that certificate comes from the jurisdiction where the marriage took place, with its own timelines.

  3. Step 3: Check whether the RD-232 also applies to you

    This is the most overlooked conditional requirement, and it applies when two conditions hold at once: that the parents married outside Puerto Rico and that the person to be legitimated is a minor. In that scenario the Registry also asks you to complete Form RD-232, Paternity Recognition. If only one of the two conditions holds, it does not apply.

  4. Step 4: Coordinate everyone’s identification

    The Registry asks for photo identification of both parents and also identification of the person being legitimated. And if that person is of legal age, their letter of acceptance is required, or a sworn statement if they will not appear in person. Coordinating that is usually what delays the process most when the child is already an adult.

  5. Step 5: Go to the Central Office with the $10.00 stamp

    The Registry states this process is carried out only at the Central Office, Metro Center, Calle Mayagüez #5, San Juan, PR 00910. Bring the completed legitimation application and the $10.00 internal revenue stamp.

Where to do it

Only at the Demographic Registry’s Central Office: Metro Center, Calle Mayagüez #5, San Juan, PR 00910.

How long it takes

Check the current processing time with the official agency.

What to do if something goes wrong

If the Registry tells you your case is not a legitimation, the defining fact is most likely missing: that the biological parents married after the birth. Without that marriage, what usually applies is a paternity recognition. If you are asked for the RD-232 and did not expect it, check whether both conditions hold: marriage outside Puerto Rico and a minor being legitimated. If the person to be legitimated is of legal age and cannot attend, the route the Registry names is the sworn statement instead of appearing. And if the marriage took place outside Puerto Rico, that certificate must be requested from the jurisdiction where it happened, not from Puerto Rico’s Demographic Registry. PRFácil does not file legitimations and does not provide legal advice; if there is a dispute over filiation, that is a court matter and a lawyer’s.

Common mistakes

  • Requesting a paternity recognition — at $20.00 or $35.00 — when the situation is really a legitimation, which costs $10.00.
  • Going without the marriage certificate when the parents married outside Puerto Rico.
  • Overlooking the RD-232 in the one scenario that requires it: marriage outside Puerto Rico and a minor being legitimated.
  • Showing up without one of the two parents’ identification, when the Registry asks for both.
  • Not obtaining the letter of acceptance when the person to be legitimated is already of legal age.
  • Going to a local office instead of the Central Office in San Juan, which is where the process is carried out.

Frequently asked questions

What is the difference from a paternity recognition?

The triggering fact. Legitimation occurs when the biological parents marry after the child’s birth. Recognition is the process in which a father admits paternity, with or without a marriage involved. They also differ in cost: legitimation carries a $10.00 stamp; recognition, $20.00 within 90 days or $35.00 after.

My child is already an adult. Can they be legitimated?

The Registry contemplates that case: if the person to be legitimated is of legal age, it asks for a letter of acceptance, and a sworn statement if they do not appear in person. So their express consent is required.

When is the RD-232 required?

When two conditions hold at once: that the parents married outside Puerto Rico and that the person to be legitimated is a minor. In that scenario the Registry also asks you to complete Form RD-232, Paternity Recognition.

Official sources

These are the government pages this guide is based on.

Last verified

August 13, 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.

MiPRFácil does not submit applications on your behalf.

Was this guide helpful?

Did you find out-of-date information?

Did you find out-of-date information?

No account needed. We don't ask for personal data.