In this article, we will discuss how to write a formal letter to a judge, along with the proper format and a sample letter. You cannot write a letter to the family court judge.This would be considered an ex parte communication. I am writing this letter on behalf of a family member mine who is presently before you on criminal charges and is due to be sentenced shortly. What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. These form packets are designed for use before coming to the Courthouse to file, if you do not have an attorney to prepare your forms for you. Writing a character letter for a judge can be a daunting task. Here are nine essential tips for writing an effective sentencing letter. You can ask a judge for an order about child custody and parenting time (also called visitation).