You need to discuss this with an attorney.  The biological father still has rights and your child is still entitled to child support from this person so I wouldn't count that out. I would not consider putting someone else on the birth certificate until legal adoption occurs (really for the benefit of the child) and the biological father has then been allowed by the court to give up his paternal rights. It is wonderful someone wants to step up to be a father but you want to make sure everything is done cleanly again for your child's benefit. Recognition of Parentage is helpful but legal adoption will truly help this child in terms of future matters.