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. 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. Sample 2 – For Child Custody. 1 – Provide The Heading And The Greeting. In the first paragraph, state how you know the person and attest to their character. In this article, we will discuss how to write a formal letter to a judge, along with the proper format and a sample letter. You write a DECLARATION, under PENALTY OF PERJURY and state in the beginning: I JANE SMITH, DECLARE: 1. A character letter is a letter of support from people who know you to help show judges and DAs the positive sides of you.