How to address mail
ADDRESSING MILITARY & DIPLOMATIC MAIL
Each shipment to an APO/FPO/DPO needs the recipient's name, rank, and unit, and the APO/FPO/DPO address with the ZIP Code™. Always include a return address. Mail and shipments must be addressed to a specific person; addressing to "Any Service Member" is no longer permitted. To prevent mail from entering foreign mail networks, do not include city or country names in APO/FPO/DPO shipping addresses. Here are properly addressed shipment examples:
Army/Air Post Office (APO)
PFC JOHN DOE
PSC 3 BOX 4120
APO, AP 96205