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.
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
- That the biological parents married after the birth of the person to be legitimated.Verified against the official source
- Presenting the marriage certificate, if the marriage took place outside Puerto Rico.Verified against the official source
- Photo identification of both parents, and identification of the person to be legitimated.Verified against the official source
- If the person to be legitimated is of legal age, a letter of acceptance, or a sworn statement if they do not appear in person.Verified against the official source
- Completing the legitimation application and bringing a $10.00 internal revenue stamp.Verified against the official source
- If the parents married outside Puerto Rico and the person to be legitimated is a minor, also completing Form RD-232, Paternity Recognition.Verified against the official source
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
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.
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.
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.
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.
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
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.
- Departamento de Salud de Puerto Rico
Salud
www.salud.pr.gov
- Demographic Registry — vital event certifications
Departamento de Salud
www.salud.pr.gov
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.
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Who can request one, what each copy costs, which channels are available, and how long each one takes.
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