need advice gusto kong panagutan ang baby ng girlfriend ko kahit di ako ang ama.

i wish i could tell you it is perfectly fine, but it's falsification and perjury.

However, if you did issue an affidavit of acknowledgement and later married her, the child will become your legitimate child and there will be a strong legal presumption that he is your child.

[b] maraming salamat po sa advice sir fully appreciated po!

Sir ito po ba ang Fraud na sinasabi nyu sa akin at sa girlfriend ko. cnu po ba ang makakafile nito ako o yung biological father.

Art. 46. Any of the following circumstances shall constitute fraud referred to in Number 3 of the preceding Article:
(1) Non-disclosure of a previous conviction by final judgment of the other party of a crime involving moral turpitude;
(2) Concealment by the wife of the fact that at the time of the marriage, she was pregnant by a man other than her husband;
(3) Concealment of sexually transmissible disease, regardless of its nature, existing at the time of the marriage; or
(4) Concealment of drug addiction, habitual alcoholism or homosexuality or lesbianism existing at the time of the marriage.
No other misrepresentation or deceit as to character, health, rank, fortune or chastity shall constitute such fraud as will give grounds for action for the annulment of marriage. (86a)

Sir ito na po yung pang void sa marriage nila. tama po ba ito.

Art. 44. If both spouses of the subsequent marriage acted in bad faith, said marriage shall be void ab initio and all donations by reason of marriage and testamentary dispositions made by one in favor of the other are revoked by operation of law. (n)

thanks po sa idea at guide.

if you want by the book, then get married and then both of you adopt the child