Credit cards have an additional layer of security thanks to a three ... back of the card, near the signature strip. However, American Express cards use a four-digit security code, often called ...

Thankfully, you don’t have to memorize your credit card ... your card will also have a three- or four-digit number either on the front or back. This number can be called the CVV, CVC, CVC2 ...

If you get a call like this, hang up and take matters into your own hands. Take out your credit card and call the number on ...