When you submit an online order with a credit card, several security measures exist to ensure you're the proper owner or authorized user of the card. One such check is a comparison of the address on file with your credit card issuer with the billing address submitted when you make a purchase. If your address doesn't match, your order typically isn't accepted by the business' online order security system.

Other Security Measures

The address match is just one of several safety checks with an online order. The three-digit security PIN on the back of the card is another. You often must submit this to process an order. This check ensures you have the actual card in hand. Similar rules apply if you try to use a debit card for an online order.