In the Philippine legal system, a surname is more than just a label; it is a declaration of lineage and a nexus of legal rights and obligations. The rules governing which surname a child may use are dictated by the child's status—whether legitimate or illegitimate—and have evolved significantly through the New Civil Code, the Family Code, and the landmark Republic Act No. 9255.
1. Legitimate and Legitimated Children
For children born within a valid marriage, the law is straightforward. Under Article 364 of the New Civil Code, legitimate and legitimated children shall principally use the surname of the father.
- Legitimate Children: Born during a valid marriage.
- Legitimated Children: Born outside of wedlock to parents who were not disqualified by any impediment to marry each other at the time of the child's conception, and who subsequently enter into a valid marriage.
In these cases, the use of the father's surname is a right and a requirement reflected immediately upon the registration of the birth.
2. Illegitimate Children: The RA 9255 Framework
The landscape for illegitimate children changed drastically with the enactment of Republic Act No. 9255 (amending Article 176 of the Family Code), which took effect on March 19, 2004. Prior to this, illegitimate children were strictly required to use the surname of their mother.
Under the current law, illegitimate children may use the surname of their father if their affiliation has been expressly recognized by the father.
Recognition of Paternity
To use the father's surname, the father must recognize the child through any of the following:
- The Record of Birth: Signing the birth certificate at the time of registration.
- Affidavit of Admission of Paternity (AAP): A separate sworn statement executed by the father admitting he is the biological parent.
- Private Handwritten Instrument (PHI): A document entirely written and signed by the father in which he acknowledges paternity.
3. The Affidavit to Use the Surname of the Father (AUSF)
While paternity can be admitted through the documents above, the actual transition to using the father's surname requires a specific document: the Affidavit to Use the Surname of the Father (AUSF).
The requirements and the person executing the AUSF depend on the age of the child:
| Age of Child | Who Executes the AUSF? | Requirements/Consent |
|---|---|---|
| 0 to 6 years old | The Mother | The mother executes the affidavit on behalf of the child. |
| 7 to 17 years old | The Child | The child executes the AUSF with the attestation of the mother. |
| 18 years and above | The Child | The child executes the AUSF personally; no maternal consent is required. |
4. Documentary Requirements for Registration
To process the use of the father’s surname at the Local Civil Registry Office (LCRO), the following documents are typically required:
- The Document of Recognition: (AAP, PHI, or the signed Birth Certificate).
- The AUSF: Duly notarized.
- Certified True Copy of the Birth Certificate: If the registration is being updated after the initial birth record was filed.
- Valid IDs: Of the mother, the father (if applicable), and the child (if of age).
- Sworn Attestation: Required if the child is between 7 and 17 years old.
5. Retroactivity and Limitations
A common point of confusion is whether children born before March 19, 2004, can benefit from RA 9255. The Supreme Court and the Philippine Statistics Authority (PSA) have clarified that the law applies retroactively. Illegitimate children born under the old Family Code rule (where they were forced to use the mother’s surname) can still file an AUSF, provided the father has recognized them.
Key Legal Nuances:
- No Compulsion: Recognition of paternity allows the child to use the father's surname, but it does not automatically change the child's status from illegitimate to legitimate.
- The Mother's Surname: An illegitimate child who uses the father's surname still retains the mother's surname as their middle name.
- Administrative Process: If the birth occurred in the Philippines, the documents are filed with the LCRO where the birth happened. If the birth occurred abroad, it must be processed through the Philippine Foreign Service Post (Consulate or Embassy) having jurisdiction over the place of birth.
6. Judicial Recognition
If the father refuses to sign an AAP or the birth certificate, the child (or the mother) may file a Petition for Compulsory Recognition in court. Once a final court judgment is rendered declaring the man as the father, the child may then proceed to use the father's surname by presenting the Certified True Copy of the Court Decision and its Certificate of Finality to the Civil Registrar.