A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. "Learn how to craft an effective character reference letter for court proceedings with our comprehensive guide.A character recommendation letter for court is a document that provides insight into your character and personal attributes. 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. Tips: Keep the letter honest but positive. Avoid downplaying the seriousness of the DUI. If possible sign the letter along with typing out your full name. Example Format for a Character Letter to the Judge. Date.