Unfortunately in Arizona there is case law that a man who signs the affidavit to put their name on a birth certificate can only take action to challenge paternity within 6 months of signing the affidavit, and then he must prove he was unaware he was not the father. You should, however, consult with an experienced family law attorney in your area to discuss this. Since he may be treated as the father for other purposes perhaps he would sign a consent to the child's adoption.
Answered on Aug 13th, 2013 at 10:02 AM