In this article, we will discuss how to write a formal letter to a judge, along with the proper format and a sample letter. I am requesting leniency and probation (if possible).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. You cannot write a letter to the family court judge. This would be considered an ex parte communication. What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. A character letter is designed to show support for a defendant in a criminal case. These letters have the potential to influence the court. Individuals with close, personal relationships with the defendant are ideal for writing character letters.