But there is ways around it. Apple Pay defaults to credit, so you're not able to purchase a money order with it.Decide on the money order amount. Provide a Bank Letter from a U.S.-based bank to Buyer Services. Contact Patient Account Services to make a payment. We also accept payments via the USPS mail: paper mail. Yes, you can buy a money order with Apple Pay, but it largely depends on the location and the payment options the merchant accepts. You can also contact the TSA Contact Center at or fill out an online form. We also accept payments via the USPS mail: paper mail. Just write your loan number on a check or money order payable to `Servbank.