The letter should be polite, concise, and professional, emphasizing personal growth and the benefits of expungement. The letter should include the name of the court your case was filed in and the case number at the top right.Put the caption (St. v. I am writing to request that I be allowed to file a petition for expungement of my criminal record before the required waiting period. This video will help you fill out the forms needed to request expungement. At any hearing related to action such as this in the USA a Judge is going to look for evidence (proof) of positive changes in your behavior. Example: "I am writing to formally request an expungement of my criminal record. Please print and fill out the appropriate form. You may mail the form or bring it in person to the Justice Court, Precinct 4. Please print and fill out the appropriate form.