According to the Family Code of the Philippines, the father of the illegitimate child is still responsible to provide support.
Art. 197. In case of legitimate ascendants; descendants, whether legitimate or illegitimate; and brothers and sisters, whether legitimately or illegitimately related, only the separate property of the person obliged to give support shall be answerable provided that in case the obligor has no separate property, the absolute community or the conjugal partnership, if financially capable, shall advance the support, which shall be deducted from the share of the spouse obliged upon the liquidation of the absolute community or of the conjugal partnership. (n)
Art. 198. During the proceedings for legal separation or for annulment of marriage, and for declaration of nullity of marriage, the spouses and their children shall be supported from the properties of the absolute community or the conjugal partnership. After the final judgment granting the petition, the obligation of mutual support between the spouses ceases. However, in case of legal separation, the court may order that the guilty spouse shall give support to the innocent one, specifying the terms of such order. (292a)
Art. 199. Whenever two or more persons are obliged to give support, the liability shall devolve upon the following persons in the order herein provided:
(1) The spouse;
(2) The descendants in the nearest degree;
(3) The ascendants in the nearest degree; and
(4) The brothers and sisters. (294a)
Art. 200. When the obligation to give support falls upon two or more persons, the payment of the same shall be divided between them in proportion to the resources of each.
However, in case of urgent need and by special circumstances, the judge may order only one of them to furnish the support provisionally, without prejudice to his right to claim from the other obligors the share due from them.
When two or more recipients at the same time claim support from one and the same person legally obliged to give it, should the latter not have sufficient means to satisfy all claims, the order established in the preceding article shall be followed, unless the concurrent obligees should be the spouse and a child subject to parental authority, in which case the child shall be preferred. (295a)
You have to consult a professional attorney in the Philippines who can file a case on your behalf.
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