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. File this form when you and the other party cannot agree to a temporary arrangement for parenting, child support, or other issues before the final hearing date.Downloadable template and sample letter to a judge. Below, find a fill-in-the-blank template, as well a detailed example of a declaration letter. The following forms are available for downloading, printing and completing. Fill out the demand letter template with your information and sign the letter. Make three copies of the letter. These forms allow parents, families, and employers to provide the Child Support Division with additional information so we can better serve you. Military. Military Affidavit. This form is used as proof to the court that a custodial or noncustodial parent is in the military.