| Diego Valdez Customer Service Representative |
Hello DropBearHunter,
Steve is correct. PO Boxes are usually owned/provided by your local postal service (here in the US that is United States Postal Service, or USPS), which is where the term Post Office Box comes from. As a result other competing postal services like UPS or FedEx usually cannot deliver to those post office boxes.
Some of these postal companies, like UPS, offer their own equivalent. Those will usually be associated with a street address though, rather than a PO Box address, and may or may not accept mail from competing delivery services.
There are also some countries that don't offer door to door mail delivery that have a PO Box equivalent for residents. Those usually can accept mail from other postal services.
In general though if you have a local postal service that does deliver door to door and you have a PO Box with them, it is likely that other postal services will not be able to deliver to it.