How can I prevent my child’s bio father from ever having legal rights over my child?

.If you know that he is the Father, he has parental rights, but not residential rights. Back in 2001 the paternity statute was changed to give a biological father parental rights at the hospital if he signed the proper form. If that form was signed by Dad, then paternity has already been established. If not, than once a Petition for paternity (which will happen once DSHS catches up with him for failing to pay support), he can Petition the court for visitation. The only way to stop him from having any parental rights is for another to step into his shoes and adopt the child, but he would have to agree to the adoption by terminating his own parental rights