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. Writing a character letter for a judge can be a daunting task.Here are nine essential tips for writing an effective sentencing letter. A character letter is designed to show support for a defendant in a criminal case. These letters have the potential to influence the court. Your Information (first thing that goes on the inside of the letter). What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. There's not time to read all that comes before a judge to read. 2. The goal of character reference letters is to tell the judge a story.