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.Everything you need to write a declaration letter to the judge in your custody case: an example, a downloadable template, an outline and tips. How do I write a letter to a Judge in a custody battle with my former NARC husband? Cut and paste the appropriate template for the court in which your case will be heard. Choose from District, County, County Court at Law, or Justice Court. This guide tells you how to ask for a custody, visitation, child support, medical support, and dental support order. These are the official forms for use in Family Court proceedings. 10.1 Letters and Orders. In general, Texas has very few official legal forms.