I went to court with the guy that wasnt his father n did paternity test that prove he wasn't so they took his name off birth certificate now I have a blank birth certificate and the paternity paper where it say father is blank. I also went to court with his biological father that prove he is the father . At the moment I'm happily with my son biological father but my son still have the other guy last name. I just don't know where to start to change his last name to his biological father

