In the Philippines, the naming conventions for illegitimate children have undergone significant legal evolution. Historically, the Civil Code mandated that illegitimate children strictly use the surname of their mother. However, with the enactment of Republic Act No. 9255, which amended Article 176 of the Family Code, the law now provides a clear mechanism for these children to bear their father’s surname, provided certain conditions of recognition are met.
1. The Legal Foundation: Republic Act No. 9255
Signed into law in 2004, RA 9255 granted illegitimate children the right to use the surname of their father if the latter has expressly recognized the child. This recognition serves as the "key" that unlocks the use of the paternal surname.
Requirements for Recognition
Recognition can be established through any of the following:
- The Birth Certificate: The father's signature appearing on the "Acknowledgment" or "Admission of Paternity" section on the back of the Certificate of Live Birth (COLB).
- A Public Document: A separate notarized document, such as an Affidavit of Admission of Paternity.
- A Private Handwritten Instrument: A document written entirely in the father's handwriting and signed by him, where he clearly admits paternity.
2. The Role of the AUSF (Affidavit to Use the Surname of the Father)
While recognition proves paternity, the Affidavit to Use the Surname of the Father (AUSF) is the procedural document that actually authorizes the change of surname in the civil registry.
The person who must execute the AUSF depends on the age of the child:
- Child is 0 to 6 years old: The mother or guardian executes the AUSF.
- Child is 7 to 17 years old: The child executes the AUSF with the "attestation" (formal support) of the mother or guardian.
- Child is 18 years or older: The child executes the AUSF personally, without needing the mother’s attestation.
Note: Under current Philippine Statistics Authority (PSA) rules, if the child was born after the effectivity of RA 9255 and the father signed the birth certificate, the AUSF is mandatory to move the child's surname from the mother’s to the father’s.
3. Procedural Steps for Filing
The process differs depending on whether the birth is being registered for the first time or if the birth certificate is being updated later.
For New Birth Registrations
If the father is willing to recognize the child at the time of birth, he signs the COLB at the hospital or the Local Civil Registrar (LCR). The AUSF is filed simultaneously. The child’s name will then be registered using the father’s surname immediately.
For Late Application (Updating an Existing Record)
If the child was originally registered under the mother’s surname:
- Preparation: Secure the Affidavit of Admission of Paternity (if not already on the COLB) and the AUSF.
- Filing: Submit these documents to the LCR where the birth was registered.
- Annotation: The LCR will not issue a new birth certificate but will instead annotate the original one. The annotation will state that the child is now authorized to use the father's surname pursuant to RA 9255.
- PSA Certification: Once the LCR processes the change, the records are forwarded to the PSA. You can then request a certified copy of the birth certificate showing the annotation.
4. Summary of Requirements by Category
| Document Needed | If Father Signed Birth Certificate | If Father Did NOT Sign Birth Certificate |
|---|---|---|
| Paternity Proof | Already on record | Affidavit of Admission of Paternity |
| Authority to Use Surname | AUSF is required | AUSF is required |
| Consent | Mother (if child is minor) | Mother (if child is minor) |
| Filing Fee | Required by LCR | Required by LCR |
5. Frequently Asked Questions
Can the mother block the use of the father's surname? If the child is a minor (under 7), the mother generally executes the AUSF. If she refuses to do so, the child typically continues to use her surname. However, if the child is between 7 and 17, the child’s preference begins to carry weight, and once the child is 18, they can execute the AUSF independently of the mother’s wishes, provided the father has recognized them.
Does using the father's surname grant automatic support? While using the surname is a strong indication of a legal relationship, the right to support and successional rights (inheritance) flow from the fact of recognition/paternity, not merely the choice of surname.
What if the father refuses to recognize the child? If the father refuses to sign any document, the child cannot use the surname through the administrative process of RA 9255. The mother or child would instead need to file a Compulsory Recognition case in court to prove filiation through DNA testing or other evidence.