I live in Atlanta Georgia and I am just curious to know if I have to get consent from my child's (bio)father. I have been marriedfor 3 years now and my son considers my husband his father. My son's real father acts like he wants to be involved, but for 6 years has done close to nothing. Can I hyphenate my son's name without consulting him?? I 'm not trying to take his bio dads name off I just want to add my husband's last name on.What is the name of your state (only U.S. law)?