A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. The character reference letter for court serves the purpose of offering the Judge insights into the Defendant's moral or mental attributes.The letter should include the name of the court your case was filed in and the case number at the top right. Put the caption (St. v. Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide. First, introduce yourself and explain your relationship to your boyfriend and how long you've been together. Everyone's legal situation is different. Second Paragraph: Explain why you are writing the letter. Remember, ultimately, you will want to end the letter with an endorsement of the Defendant.