How will I know when APO Box Receives my package? January 26, 2023 15:46 Updated APO Box will send you an e-mail providing you a package number along with a status for the order. Related articles What are the mailing restrictions for APO/FPO Addresses? What if my package needs signature upon delivery? Is military mail subject to host country customs requirements? My credit card was declined? What do I need to do? What happens to my package if it exceeds the physical restrictions?