All APO/FPO addresses are considered US addresses and are shipped or mailed with USPS. Your order will successfully process as long as you enter a valid USPS address. Please keep in mind that we do not offer our Shipped To You service (where we send you the cards) to any international locations at this time unless it is of course an APO/FPO address. If you desire to ever have your cards mailed internationally you can choose our Mailed For You Service after personalization.
If you are having trouble with your address or have any other questions, please contact us and we will help make sure all your addresses are correct.