Problems with NSO Birth Certificate: Illegitimate, No Birth Certificate, and Not Acknowledged by her Mother

Alona is an illegitimate child, born to parents who were barely out of their teens.  Her mother gave her up for adoption when she was just a few days old, in exchange for a plane ticket from Manila to Iloilo.  She was never heard of from again.  Upon learning that his daughter was given to

NSO: Acknowledgement or Affidavit to use the surname of the father (AUSF)

Bonjour. Mabuhay. Marami ang nagtatanong tungkol sa surname nila na ginagamit.  Mayroon kasi na surname ng mother nila ang ginagamit for various reasons na alam na natin halos lahat. For these cases, there comes a time when the person wants to use the surname of the father, no matter how old the person is. Possible?