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.A character letter plays a dual role. 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. The California Rules of Court are not printed as part of the Stanislaus County Local. Rules, but are considered incorporated within them. The California Rules of Court are not printed as part of the Stanislaus County Local. Rules, but are considered incorporated within them.