I am writing this letter on behalf of a former student of mine who is presently before you on criminal charges and is due to be sentenced shortly. Be specific and provide examples of the person's good character.A character reference letter can make a difference in a child custody case. It provides evidence of your parenting abilities. A character letter is designed to show support for a defendant in a criminal case. These letters have strong potential to influence the judge. Family court rules for reference letters in child custody cases. Remember, ultimately, you will want to end the letter with an endorsement of the Defendant. Express your belief that the parent is the most suitable guardian for their children. Provide facts to back this up.