Write your address in the purchaser section. Include your account number if you're paying a bill.Fill in the recipient's name. I'm going to show you how to fill out a money order from the USPS or the United States Postal Service. 1 Check that the money order amount is correct. 1. Fill in the payee's name. Put the payee's name on the line labeled "Pay to the order of" or "Pay to. Click "forms" and enter the form numbers below (all forms begin with AOC-E-__). In the sample complaint form, note the choices of boxes the plaintiff may use. You can check a box and fill in the information on the line next to the box.