your son was 18 when the father changed the child's name? How long ago did your son receive the birth cert?
Contact the office of vital records (or whatever state department deals with birth certs) and HAVE YOUR SON tell them he is 18 and explain to them the situation.What can we do to reverse this?
How do you know the father had the name changed? did he change just the last name or the first and/or middle as well? Did he change it to his own name?

