A character letter plays a dual role. Sample Format for a Character Letter.If you have been asked to write a character letter, this simple template may be a useful guide. The character reference letter for court serves the purpose of offering the Judge insights into the Defendant's moral or mental attributes. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. Introduce yourself in the opening paragraph. Note to Petitioner: Please provide three (3) character references. Defend a friend or family member's moral character in court.