Generally, an illegitimate child is entitled to support but the law requires proof of filiation or relationship between the child and the supposed father.
The Supreme Court, in a line of cases, considered the following as acceptable proof of filiation:
- voluntary recognition by the father in the birth certificate, will, or a statement before a court of record
- an admission of filiation in a public instrument or a private handwritten instrument(document) AND signed by the parent concerned
- a notarized agreement to support a child in which the father admitted his relationship to the child
- letters to the mother vowing to be a good father to the child AND pictures of the father cuddling the child on various occasions, TOGETHER with the certificate of live birth.
So far, it seems that in the Philippines, only the University of the Philippines National Science Research Institute (UP-NSRI) DNA Analysis Laboratory has the capability to conduct DNA typing using short tandem repeat (STR) analysis.