Under Philippine law, the naming rights of illegitimate children have undergone significant shifts, moving from a restrictive "mother’s surname only" rule to a more inclusive framework that allows the use of the father's surname under specific conditions. This right is primarily governed by Republic Act No. 9255, which amended Article 176 of the Family Code of the Philippines.
The General Rule and the Exception
Historically, Article 176 of the Family Code mandated that illegitimate children shall use the surname and shall be under the parental authority of their mother. However, the enactment of R.A. 9255 (effective March 19, 2004) introduced a critical exception.
Illegitimate children may now use the surname of their father if:
- Their filiation has been expressly recognized by the father through the record of birth appearing in the civil register; or
- A final relevant court order has been issued; or
- The father has executed an Admission of Paternity or a Private Handwritten Instrument.
Modes of Recognition
For an illegitimate child to legally use the father's surname, the father must manifest his recognition of paternity through one of the following legal documents:
- Affidavit of Admission of Paternity (AAP): This is a public document executed by the father, usually at the time of birth, where he formally admits paternity of the child.
- Private Handwritten Instrument (PHI): A document entirely written and signed by the father (holographic) where he acknowledges the child as his. If the father is deceased or unable to sign, this document may be used as evidence in court to compel the use of the surname.
- Birth Certificate Signature: The most common method is when the father signs the "Informant" section or the "Affidavit of Admission of Paternity" located at the back of the Certificate of Live Birth (COLB) at the time of registration.
The Role of the AUSF
Even if paternity is admitted, the change of surname is not automatic for children born after the effectivity of R.A. 9255. The mother or the guardian must execute an Affidavit to Use the Surname of the Father (AUSF).
| Requirement | Description |
|---|---|
| Who executes? | The child (if of age), the mother, or the legal guardian. |
| Where to file? | The Local Civil Registry (LCR) where the birth was recorded. |
| Consent | If the child is between 7 and 17 years old, an attestation of the child is needed. If the child is 18 or older, the child himself/herself must execute the AUSF. |
Retroactivity and Scope
The Supreme Court and the Office of the Civil Registrar General have clarified the temporal application of these rules:
- Children born before March 19, 2004: While originally governed by the old strict rule, administrative regulations now allow for the retroactive application of R.A. 9255, provided the father has recognized the child in a public document or a private handwritten instrument.
- Children born during the effectivity of the Family Code (Aug 3, 1988 - March 18, 2004): These children can also avail of the benefits of R.A. 9255 by filing the necessary affidavits (AAP/AUSF) with the LCR.
Legal Effects and Limitations
- Parental Authority: Despite using the father's surname, Article 176 still dictates that parental authority remains solely with the mother, unless otherwise ordered by a court.
- Succession: The use of the father's surname serves as strong evidence of filiation, which is vital for the child's claim to legitime (compulsory inheritance). Under the law, an illegitimate child is entitled to one-half of the legitime of a legitimate child.
- Discretionary Right: The Supreme Court (e.g., in Grande vs. Antonio) has clarified that the use of the father's surname is a right granted to the child, not a requirement. The mother or the child (if of age) may choose to maintain the mother's surname if they deem it in the child's best interest.
Procedure for Registration
To finalize the process, the following documents are typically submitted to the Local Civil Registrar:
- Certificate of Live Birth (original and photocopies).
- Affidavit of Admission of Paternity (if not signed on the birth certificate).
- Affidavit to Use the Surname of the Father (AUSF).
- Certificates of Registration of the Affidavits.
Once processed, the LCR will issue a Certified True Copy of the Birth Certificate with an annotation stating that the child is now authorized to use the surname of the father pursuant to R.A. 9255.