A character letter is designed to show support for a defendant in a criminal case. These letters have the potential to influence the court.In this article, we will discuss how to write a formal letter to a judge, along with the proper format and a sample letter. Dear Judge Mattison. The character reference letter for court serves the purpose of offering the Judge insights into the Defendant's moral or mental attributes. We provide templates and tips on how to properly address a letter to a judge, ensuring your letter begins and ends with the appropriate formalities. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Address the judge respectfully. Briefly introduce yourself and your relationship to the individual. Just say what you know and feel about your friend and don't make it too ling.