Address examples
PO Box Address Examples
A PO Box address uses a post office box number instead of a standard street address. It is a useful case for address-form testing because some systems expect a house number and street name on every record.
Basic PO Box format
Taylor Brooks
PO Box 4821
Phoenix, AZ 85001
United States
Common testing issues
- Forms that require a numeric street number before a street name.
- Validation that rejects PO, P.O., or Box text.
- CSV exports that split PO Box into the wrong column.
- Checkout flows that allow PO Boxes for billing but not shipping.
PO Box and delivery rules
Some businesses restrict PO Box shipping for certain carriers or product types. If your product has shipping rules, test PO Box records separately from normal street addresses.
Generate PO Box samples
The U.S. address generator includes PO Box-style examples alongside street, apartment, suite, rural route, and ZIP+4 variants.
PO Box test vectors
| Input | Expected behavior | Failure to watch for |
|---|---|---|
| PO Box 4821 | Store the complete delivery line as text | Form requires a leading street number |
| P.O. Box 18 | Apply the product's documented normalization rule | Periods trigger punctuation rejection |
| PO Box 7 + ZIP 02108 | Preserve the ZIP leading zero | Spreadsheet converts ZIP to 2108 |
| Street line plus PO Box | Prompt for the supported delivery choice | Two competing delivery lines are silently merged |
Separate syntax from eligibility
A parser can recognize a PO Box without knowing whether a particular carrier or product can deliver to it. Keep these decisions separate: first parse and store the address faithfully, then apply the shipping method's eligibility rule. If the checkout rejects the address, the error should explain the delivery limitation rather than claim that the address format is invalid.
Primary reference
USPS Publication 28, Post Office Box Addresses describes the standard PO BOX designator and placement. Carrier-specific acceptance still needs a separate check.