These forms and instructions are available in the General Clerk's Office, Room 108, in the Nassau County. Form Number. Title. PDF. DOC. WPD. GF-17.Complete General Form 17 to petition for custody or visitation. The following forms are available for downloading, printing and completing. This guide includes forms and instructions for a letter and affidavit to request that the court register an out-of-state custody order in Texas. This guide tells you about responding to a custody case when it's part of a "Suit Affecting the ParentChild Relationship" (SAPCR for short). This guide tells you how to ask for a custody, visitation, child support, medical support, and dental support order.