A money order is a way to send money to another person or business. Fill in the recipient and your address; for bills, include an account number; sign it; keep proof of payment.Fill in the recipient's name. 1. Fill in the payee's name. Put the payee's name on the line labeled "Pay to the order of" or "Pay to. Fill out your money order using a black or blue pen and print clearly. Because money orders are prepaid, you'll need to pay for yours upfront. Here are the steps to complete a money order and how to file a claim and get reimbursed in case your money order is lost, misplaced or stolen. Pay for the money order using cash, debit card, or a traveler's check. Locations like the USPS won't let you pay for a money order with a check or credit card.