You just do a Request for Order (FL300) and request a change of venue. Attach a declaration with the facts of the move and your ex being out of the State.The residence of the child is the main concern in custody issues, so a change of venue based on that is very likely. Looking to transfer a family law case to another county? Learn how to file a motion for change of venue and move your case to another California court. Your Motion to Change Venue package should include: 1. If you request me I will do my best to get you the legal information you need. Who Can File a §388 Petition? Completing RFO Legal Forms. This HowTo Guide addresses obtaining a default judgment in a civil matter in Riverside County Superior Court.