Apple Pay defaults to credit, so you're not able to purchase a money order with it. Scroll down and check the box next to Apple Pay Later, then click or tap Continue.Review the selection and click or tap "Complete request". CHILD SUPPORT - HOW TO PAY. We are pleased to offer several ways to pay child support. But there is ways around it. Fill in the recipient's name. If a payment terminal requires you to enter a PIN to complete a transaction with your Apple Cash Card, you should enter "0000" as your PIN. Send a check or money order with your bill stub in the provided return envelope. Payments are usually processed within 3 to 5 business days.