The goal of character reference letters is to tell the judge a story. To give the judge insight into a defendant as a person.A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Include specific examples of how the person has helped you or someone else, or how he or she has been a leader or an inspiration. There's not time to read all that comes before a judge to read. 2. How To Start Your Letter. Character Letters are a great tool to help convince a judge to give a reduced sentence in a criminal case. 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. Introduce yourself in the opening paragraph. More specifically, explain how you met him and how well you feel you know him.