Fill in the recipient and your address; for bills, include an account number; sign it; keep proof of payment. In the "Pay to" or "Pay to the order of" field, write the name of the person or business you are paying.Check that the money order amount is correct. 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. Filling out a money order is a straightforward stepbystep process. Just follow these instructions and you'll be ready to send your money. Go to any Post Office location. Take cash, a debit card, or a traveler's check. You will need to provide a photo ID, such as a driver's license, passport, or other governmentissued ID, to cash a money order. Fill out your money order using a black or blue pen and print clearly.