Fill in the recipient and your address; for bills, include an account number; sign it; keep proof of payment. 1. Buy a money order for the desired amount. 2.Fill in the "Pay to the Order Of" line. 3. Sign the money order where it states – "Signature," "Purchaser," or "Drawer. " Do not sign the back of the document, that is for the recipient to sign. It's similar to signing a check. You'll see a line for the purchaser's signature, usually on the front of the money order near the bottom. Fill in the recipient's name. Click "forms" and enter the form numbers below (all forms begin with AOC-E-__). Submission of Documents.