Birth certificate already registered and child is under the surname of the mother and the father executed an affidavit of acknowledgment

You can use the surname of the father by applying the provisions of R.A. 9255.

The affidavit of acknowledgment executed by the father should be registered with the civil registry office where the birth of the child was registered. Since the surname being used is the surname of the mother, an Affidavit to Use the Surname of the Father (AUSF) should also be executed with the civil registry office where the birth is registered.

Who Shall File

  • Father
  • Mother
  • Child, if of age
  • Guardian

Where to File

  • Civil registry office where the birth of the child is registered.
  • If born abroad with the Consul of the Philippine Embassy where the child is born.
  • In cases of children born abroad, the birth certificate, shall be annotated by the PSA.

Supporting Documents

  1. Affidavit of acknowledgment executed by the father
  2. AUSF

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