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?A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide. Character reference letters can play an important role in defending a criminal case. While "character" is normally not at issue in a jury trial. I am writing this letter on behalf of a family member mine who is presently before you on criminal charges and is due to be sentenced shortly. I am writing this letter on behalf of a former student of mine who is presently before you on criminal charges and is due to be sentenced shortly. Defend a friend or family member's moral character in court.