What parents and witnesses need to know about character reference letters to the court for child custody. Includes a downloadable sample and template.The purpose of a character reference letter for court is to paint a defendant in a positive light through the words of someone who knows the defendant well. In the first paragraph, state how you know the person and attest to their character. 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 letter to a judge should establish your credibility, paint a full picture of the defendant and be respectful, among other things. These are the official forms for use in Family Court proceedings.