Discover Requirements Cardmember ID# REQUIRED 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.
	Visa Requirements Card 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 Requirements Card 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.
	American Express Requirements Card Identification # 4-digit, non-embossed number printed on the front of the card. This number is recorded as an additional security precaution.