Use specific examples of when you observed the defendant's good character. Describe a time you saw the defendant go out of his way to help someone in need.What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. Address the judge respectfully. Briefly introduce yourself and your relationship to the individual. 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.