Ok my girlfriend has a 18 mo old baby and his biological dad has seen him once... he is on none of his paperwork such as birth certificate, nothing. He will call one day and say I want to see my son, then the same afternoon he will call and say he hates the baby and hopes to never see him. He doesn't pay child support. Doesn't pay for anything. I know that we have to get married before I can adopt him. But since he is not on any of birth certificates or anything will he still have to sign over his rights?