Free template for a character reference letter for a DUI charge! "Learn how to craft an effective character reference letter for court proceedings with our comprehensive guide.Tips: Keep the letter honest but positive. Avoid downplaying the seriousness of the DUI. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide. Defend a friend or family member's moral character in court. Use our Character Reference Letter for Court template to easily write your document.