Write your address in the purchaser section. Include your account number if you're paying a bill.Instructions for Completing Money Order Inquiry Form. Where it says "Purchaser's address," write in your full address. Sign the front of the money order. To fill out a money order you need to first fill out the who the payee is, the purchasers information and sign it. Know how and who you'll pay: Be prepared with cash or a debit card, the name of the payee and the amount you want to send. What Information Is Needed for a Money Order? 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.