The card verification is a 3 or 4 digit number on your credit card. We ask for this information as an added security measure.

	For Visa, MasterCard, and Diners, the card verification number is the 3-digit number that follows the card number in the signature area on the back of the card.
	For American Express, the verification number is the 4-digit number on the front of the card, usually to the upper-right of the card number.