A character letter is designed to show support for a defendant in a criminal case. These letters have the potential to influence the court.A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Defend a friend or family member's moral character in court. Use our Character Reference Letter for Court template to easily write your document. A character letter is a letter of support from people who know you to help show judges and DAs the positive sides of you. Our service helps you create a character letter for a judge that effectively communicates the positive qualities of the person you are writing for. Below is reference of what a letter should contain and a sample of a written letter for your use as a guide. A character letter must also be signed and contain the author's address. Dear Judge Mattison.