In the state of pennsylvania, if a biological father signs acknowledgement of paternity papers, but the mother was married at the time , and put her husbands name on the birth certificate and the child carries the husbands name, who is the legal father? In texas, a husband has to sign denial of paternity before the aop papers can make the biological father the legal father. Is this the same in PA. ? Please help. I have searched every forum on the web to get the answer to this question..