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 ...

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 ...

Security considerations You will need to choose a PIN when setting up your debit card or ATM card. This four-digit number is used to verify every transaction, whether at an ATM or a merchant.

you may be asked for the card's validation code located on the back of the card as a security measure. Most debit cards are linked to a processing network, such as Visa or Mastercard, allowing ...