A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. 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 is designed to show support for a defendant in a criminal case. These letters have the potential to influence the court. Defend a friend or family member's moral character in court. Use our Character Reference Letter for Court template to easily write your document. Learn how to write a powerful character letter to a judge on behalf of your son. 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. I've seen a lot of people saying Clark is a bad parent,he's treating Jon too harshly and Jon should runaway from home but as a parent wouldn't you be upset?