Apart from entering a card number and an expiration date, you probably will have to enter a security code — a feature on every credit card meant to help verify the card is in your possession.

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Credit card security is enhanced by several methods. First, the printed security code (CSC or CVV) on the credit card itself prevents someone from using a stolen card number over the phone or ...

As issuers constantly add security measures to protect cardholders ... expiration date and CVV code directly from a customer. Card present transaction. Thieves use a cloned card to make ...