Why do some on-line order services ask for the three digit security code on the back of my credit card?

Answer 1

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Answer 2

This is an additional security measure integrated into credit cards to positively identify whom the card is issued to.Let me cite an example, let say someone got a hold of your credit card number only, but doesn't have the 3 digit security code, and want to order something on line. The company who processes the order will ask for this three digit code, and if it could not be produced , the order will not be processed, and you are spared this time from theft.

Answer 3

This verifies that one actually has the card "in hand", and not using the card number from another source, illegally..

Answer 4

yeah what he said. someone could steal your bill from your mailbox and get all your info and buy stuff but since they don't have those 3 digits they can't