In this article, we will discuss how to write a formal letter to a judge, along with the proper format and a sample letter. Writing a character letter for a judge can be a daunting task.Here are nine essential tips for writing an effective sentencing letter. 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. You do not write letters to judges. The character reference letter for court serves the purpose of offering the Judge insights into the Defendant's moral or mental attributes. You cannot write a letter to the family court judge. This would be considered an ex parte communication.