UTTERING & PUBLISHING is the felony charge; when one sends a forged USPS money order, the felony is compounded by the US statues that apply to using the US Mail, and that that the check is a federal check. So contact the US Postal Inspector 's office with as much info you retained about the sale. The crook is looking at federal prosecution, legal defense fees, federal fines, court costs, and federal time (3 hots & a cot).