Write your address in the purchaser section. Include your account number if you're paying a bill.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. Complete Section A of the form in BLACK ink. Money orders are a safe alternative to cash or checks. Find out how much they cost, when you need one, where to buy it and how to cash it. Fill in the recipient's name. Make the money order payable to JPay.