• Write out the service member's full name in the address - All mail sent to the Military must be addressed to someone specific; addressing mail to "Any Service Member" is no longer permitted by the USPS.
• Include the unit and box (where applicable) into Address Line 1.
  
• In the 'City' field, enter APO/FPO/DPO
  
  APO is used for Air/Army Post Office; FPO is used for Fleet Post Office; DPO is used for the Diplomatic Post Office.
• From the State field, select:
• 
  
  • Armed Forces - AE is the abbreviation for Armed Forces. It is used for armed forces in Europe, the Middle East, Africa, and Canada
  •  Armed Forces Pacific - AP is the abbreviation for Armed Forces Pacific and is used for the Pacifics
  • Armed Forces America - AA is the abbreviation for Armed Forces America and it excludes Canada
• Then enter in a 5 digit zip.

SEAMAN JOSEPH SMITH
USCGC HAMILTON
FPO AP 96667

or

MSG JANE DOE
CMR 1250
APO AA 09045