Free template for a character reference letter for a DUI charge! Sample Format for a Character Letter.If you have been asked to write a character letter, this simple template may be a useful guide. I am writing this character letter on behalf of Sean McDevitt who has been charged with a DUI and injury to another person. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. Tips: Keep the letter honest but positive. Avoid downplaying the seriousness of the DUI. Defend a friend or family member's moral character in court. Use our Character Reference Letter for Court template to easily write your document. These Info Sheets are intended to help those who are seeking to file a petition or have had a ruling on a petition to seal a criminal case record.