If you've received an order with an APO, FPO, or DPO address, you might be wondering what these acronyms mean and how to handle the shipment. Military addresses have unique characteristics that affect how—and whether—you can deliver to them.
This guide explains military address formats, how they work, and what e-commerce merchants need to know about shipping to military customers.
What Are APO, FPO, and DPO Addresses?
These acronyms represent special postal designations used by the U.S. military for personnel stationed overseas or on ships:
- APO (Army Post Office) — Used by the U.S. Army and Air Force
- FPO (Fleet Post Office) — Used by the U.S. Navy, Marine Corps, and Coast Guard
- DPO (Diplomatic Post Office) — Used by U.S. embassies and diplomatic missions
These addresses look like domestic U.S. addresses but actually route packages to military bases, ships, and diplomatic facilities around the world. The "cities" in these addresses aren't real cities—they're designations that tell the postal system where to route the mail:
- AA — Armed Forces Americas (Central and South America)
- AE — Armed Forces Europe (includes Middle East and Africa)
- AP — Armed Forces Pacific (Asia and Pacific)
How Military Address Formats Work
A typical APO/FPO/DPO address looks like this:
PFC John Smith
Unit 12345 Box 6789
APO AE 09012
Breaking this down:
- Line 1: Name and rank (rank is optional but helpful)
- Line 2: Unit number and box number
- Line 3: APO/FPO/DPO + "state" code (AA, AE, or AP) + ZIP code
The address looks domestic because the U.S. Postal Service handles these shipments as if they were going to a U.S. location—even though the final destination might be Germany, Japan, or a ship in the Pacific Ocean.
Important: Never add a country name to an APO/FPO/DPO address. These addresses must be treated as U.S. domestic addresses, even though the package ultimately leaves the country.
Who Can Deliver to Military Addresses?
This is where things get tricky for merchants:
USPS: Yes
The United States Postal Service is the only major carrier that can deliver directly to APO, FPO, and DPO addresses. USPS has an agreement with the military postal system to handle this mail.
UPS, FedEx, DHL: No
Private carriers like UPS, FedEx, and DHL cannot deliver to military addresses. Their systems don't connect to the military postal network, so they have no way to get packages to these destinations.
If you exclusively ship with private carriers, you cannot fulfill orders to military addresses.
Challenges of Shipping to Military Addresses
Extended Delivery Times
USPS quotes 7-21 business days for APO/FPO delivery, but it can take longer depending on:
- Location of the military base or ship
- Frequency of mail flights to that area
- Customs processing in the destination country
- Internal military mail sorting
Size and Weight Restrictions
Packages to military addresses often have stricter size and weight limits than domestic shipments. Large or heavy items may not be accepted.
Prohibited Items
Many items that ship normally within the U.S. can't be sent to military addresses due to:
- Customs regulations of the host country
- Military base policies
- Hazmat restrictions for air transport
Common restrictions include alcohol, tobacco, lithium batteries, and aerosols.
Tracking Limitations
USPS tracking often "goes dark" once a package enters the military postal system. The last scan might be at a sorting facility stateside, with no updates until delivery confirmation (if any).
Should You Block Military Addresses?
Some merchants choose to block APO/FPO/DPO addresses. Here's when that might make sense:
Reasons to Block
- You only ship via UPS/FedEx/DHL — These carriers can't deliver to military addresses
- Your products are restricted — Items like batteries, aerosols, or alcohol can't be shipped
- You can't handle long delivery times — If your business model depends on fast delivery
- High-value items — Limited tracking makes claims and fraud more difficult to resolve
Reasons to Allow
- Serve military customers — Service members and their families appreciate merchants who ship to them
- Competitive advantage — Many stores don't ship to APO/FPO, so you stand out
- Loyalty — Military customers who find you often become repeat buyers
- You already use USPS — If USPS is in your carrier mix, military shipping is straightforward
How to Handle Military Shipping
If you decide to ship to military addresses:
1. Use USPS Services
Priority Mail and First-Class Mail work for APO/FPO at domestic rates. Priority Mail Express is available but with modified delivery standards.
2. Set Shipping Expectations
Communicate clearly about expected delivery times. Consider adding 2-3 weeks to your standard estimates for military addresses.
3. Check Prohibited Items
If you sell anything that might be restricted, check USPS guidelines for international mail (since the packages ultimately go overseas).
4. Package Carefully
Military mail goes through more handling than typical domestic shipments. Package items securely.
Need to Block APO/FPO Addresses?
No PO Box can block military addresses at checkout if your carriers can't deliver to them.
Try It Free →Conclusion
APO, FPO, and DPO addresses connect military service members and diplomatic personnel to U.S. commerce, but they come with unique shipping considerations. The key is understanding that only USPS can deliver to these addresses and that delivery times are significantly longer than standard domestic shipping.
Whether you choose to ship to military addresses depends on your carrier mix, product types, and business priorities. If you can't support these deliveries, blocking them at checkout prevents customer disappointment and failed orders. If you can support them, you'll earn loyal customers who appreciate the extra effort.