If you got a fraudulent money order or fraudulent check in the postal mail, call the USPS Postal Inspectors Mail Fraud Unit at 1-800-372-8347 from 9:00 AM to 5:30 PM EDT and they will mail you a form and envelope to mail the fraudulent money order to them.
Listen for 2 minutes then press 1. Use the link below to print out a form.
If you haven't cashed the fraudulent check or money order, mail in the original fraudulent check or money order along with the postage label/shipping label,any emails and/or letters that has to do with the scam! ehome.uspis.gov/FCSExternal/pdf/ps8165.pdf