Writing a character letter for a judge can be a daunting task. Here are nine essential tips for writing an effective sentencing letter.What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template. Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide. Be totally honest, talk about the persons positive traits. What you know they have done to better themselves while incarcerated. Defend a friend or family member's moral character in court. Use our Character Reference Letter for Court template to easily write your document.