WHAT THE INITIALS STAND FOR - NMAILING ADDRESS
APO stands for Army Post Office and is used by Army and Air Force (generally but not always).
FPO stands for Fleet Post Office and is used by Navy and Marines (generally but not always).
DPO stands for Diplomatic Post Office.Replace the city name with APO or FPO.
The above will be followed by AA, AE, AP and a special zip code. Replace the state with AA, AE, or AP and the number you are given. AA stands for Armed Forces (the Americas), AE stands for Air Forces Europe, AP Stands for Armed Forces Pacific.
Here are the prices for mailing flat rate boxes.
You can also order them from the United States Post Office online, and they will be delivered to your door
Priority Mail Flat Rate Envelope $4.90 12-1/2" x 9-1/2"
Priority Mail Small Flat Rate Box $4.95 8-5/8" x 5-3/8" x 1-5/8"
Priority Mail Medium Flat Rate Box (FRB1) $10.70 11" x 8-1/2" x 5-1/2"
Priority Mail Medium Flat Rate Box (FRB2) $10.70 13-5/8" x 11-7/8" x 3-3/8"
Priority Mail Large Flat Rate Box (Domestic Addresses) $14.50 12" x 12" x 5-1/2"
Priority Mail Large Flat Rate Box (APO/FPO Destinations) $12.50 12" x 12" x 5-1/2"
There is an additional form that needs to be filled out if it is overseas. If you are sending many packages at one time, it may be a good idea to the form first: otherwise, you will have to step aside to fill them out when you turn comes up (while you are waiting in line).
How to fill out the overseas form at the post office.
Examples, if the address is the following:
MM3 Bunker, Queen B.
USS Mighty Mouse CVN 99
FPO AE #####-####
then you would fill out the form in the following manner:
on name line: lastname: MM3 Bunker firstname: Queen B.
on address line: USS Mighty Mouse CVN 99
on city: FPO
on state: AE
on zip: #####-#### (five digits followed by four digits typically)
NOTE: IF YOUR SAILOR IS IN US (LIKE GREAT LAKES, iL 60088) it does not qualify for free postage. APO and FPO are deployed overseas addresses.