How do I change the name of a minor when the other parent will not sign the request?
When the other parent does not agree with the request to change the name of a minor, you must file a notice of hearing regarding application for change of name. Your local superior court may have forms with instructions available; you can prepare your own application or seek the help of an attorney. The office of the clerk can inform you of the current filing fee, if any.
Resources:
Courts and Civil Proceedings A.R.S. Title 12-601