A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Provide this sample letter and character letter outline to friends or relatives you ask to write a letter of support to the judge on your behalf.Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide. "Learn how to craft an effective character reference letter for court proceedings with our comprehensive guide. At the start of the letter, introduce yourself and explain how you know the defendant. If you've been asked to write to the judge, use our sample character reference letter and fill-in-the-blank template. What's a character reference letter? Courtroom Technology. 1100 Commerce Street, Room 1528.