Visa RequirementsCard Identification #3-digit, non-embossed number printed on the signature panel on the back of the card immediately following the Visa card account number. This number is recorded as an additional security precaution.
	MasterCard RequirementsCard Identification #3-digit, non-embossed number printed on the signature panel on the back of the card.. This number is recorded as an additional security precaution.