PayPal uses an Automated Verification System to verify credit card billing addresses that are entered on the system. An address is confirmed if it is associated with a credit card or can be independently verified by PayPal. Gift Addresses and addresses associated with a Switch or Solo debit card cannot be confirmed. Currently, our system cannot verify most non-U.S. credit card billing addresses.
These types of security measures are unfortunately necessary in an online environment where it is difficult to check someone's identity. In the physical world, sellers can check someone's credit card and driver's license. In the online world, where simple and effective identification tools do not yet exist, we have to take different precautions.