Fill in the name of the payee. Go to any Post Office location.Take cash, a debit card, or a traveler's check. Many establishments will ask you to pay for the money order in cash. In some cases you will be able to pay with a credit or debit card. Fill in the recipient and your address; for bills, include an account number; sign it; keep proof of payment. • Enter full 16-digit Travel Card account number on the memo line of the check or money order. • Detach payment coupon from statement and include with check. When filling out a money order, you'll need some basic information, such as the recipient's name and your address. OneAZ offers account alerts for OneAZ accounts, credit cards, debit cards, and Bill Pay.