your father or your child's father?
this is the man you chose to be the father of your child. if he was an addict, you made a bad choice.
as to the name change, the child's father has to convince a judge that the name change will be in the best interest of the child. hard to do with a three year old.
we do not have enough facts to tell you if the father can take the child from you. go see a lawyer about that.
is this man legally the father? he must be if there is a child supt. order.
again, you chose him. we did not. we cannot make him into a perfect dad now or ever, however you define perfect.
Child support arrearages have no bearing on name change. The father has to prove it's in the child's best interest that his name be changes. You must defend this action in court. Although you have many good defenses, the best way to present you case is to be represented by an attorney. Likewise, it is highly unlikely that the father can take your child from you but again - be prepared with a lawyer in case he files for custody.