Everything you need to write a declaration letter to the judge in your custody case: an example, a downloadable template, an outline and tips. If there is a Children's Lawyer or Child Advocates office, ask them to investigate.Ask them to present an opinion on which parent is best. Family law-When writing to letter to the judge. What information would be pertinent to put in and what should you avoid? What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. In this article, we will discuss how to write a formal letter to a judge, along with the proper format and a sample letter. This guide includes forms and instructions for a letter and affidavit to request that the court register an outofstate custody order in Texas. The following forms are available for downloading, printing and completing.