1. Buy a money order for the desired amount. 2. Fill in the "Pay to the Order Of" line. 3.To fill out a money order you need to first fill out the who the payee is, the purchasers information and sign it. Filling out a money order is a straightforward stepbystep process. Just follow these instructions and you'll be ready to send your money. Put the recipient's name on the "pay to" or "pay to the order of" line. Fill out the money order at the counter with a retail associate. Pay the dollar value of the money order plus the issuing fee. 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.