To fill out a money order you need to first fill out the who the payee is, the purchasers information and sign it. Write your address in the purchaser section.Include your account number if you're paying a bill. Sign your full legal signature. Do not use a nickname. 1. Buy a money order for the desired amount. 2. Fill in the "Pay to the Order Of" line. 3. Complete the fields below to proceed with your refund request. If you don't have the original copy of the money order or receipt, please fill this form instead. Your stepbystep guide for how to fill out a money order, where to get a money order, the difference between a check vs.