Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide.Have you been asked to write a recommendation letter on behalf of someone you know? Here are a few tips for writing a recommendation letter. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Sample letter to provide a character reference, with tips on how to ask for a reference, who to ask, and advice on writing one. The first paragraph should tell the judge who you are writing to him about and how you know the defendant. You'd also want to say how long you have known her. Use a formal email address, preferably one that includes your full name. What parents and witnesses need to know about character reference letters to the court for child custody.