Write your address in the purchaser section. Include your account number if you're paying a bill.1 Check that the money order amount is correct. 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 full name and address. This clarifies for the recipient who the money order is from. Fill in your address in the "purchaser" section. Sign your name on the "Purchaser, Signer for Drawer" line. Decide on the money order amount. Fill in the name of the recipient in the "pay to" section.