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?The character reference letter for court serves the purpose of offering the Judge insights into the Defendant's moral or mental attributes. Everything you need to write a declaration letter to the judge in your custody case: an example, a downloadable template, an outline and tips. A character reference letter for court child custody is a legal document serving as the recommendation for a parent who wishes to become a guardian. A character letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. A character reference letter can make a difference in a child custody case. It provides evidence of your parenting abilities. Sample Format for a Character Letter. If you have been asked to write a character letter, this simple template may be a useful guide.