To prevent fraudulent charges, most merchants require customers to provide their debit or credit card number, its expiration date and a numeric code — known as a card security code — located ...

If you're attempting to add your debit card as a payment method in the Apple Inc. iTunes Store, but you repeatedly get an error message that insists you've entered ...

Luckily for the cardholders, none of the viewable cards displayed the card security code, which on most credit and debit cards is printed on the back. (American Express cards put the security code ...