Fill in the name of the payee. Go to any Post Office location.Take cash, a debit card, or a traveler's check. Follow these five simple steps for filling out a money order: Fill in the recipient's name. Write your address in the purchaser section. Fill in the recipient's name. You can pay with cash, a prepaid debit card, a regular debit card, or a traveler's check. A card style money order bearing ABA routing number 0000-0119. Traveler's Express Money Orders. You can use cash or a debit card to buy money orders at the post office, Walmart, Western Union and other places.