The letter should be polite, concise, and professional, emphasizing personal growth and the benefits of expungement. Request a Criminal Certificate of Disposition from the court.Complete a separate request for each case you will be asking the court to seal. Except for some marijuana crimes, New York has no laws to erase or "expunge" criminal records. I am writing to request that I be allowed to file a petition for expungement of my criminal record before the required waiting period. Complete guide on how to expunge your criminal record in Bergen County. Comprehensive resource with step-by-step instructions. How do I fill this out? Comprehensive guide on how to expunge your criminal record in Gloucester County. Complete resource with a step-by-step process.