is a card that can be issued to a person other than the primary credit card holder. Additional cards may be issued for your spouse, children, or anybody else you want to use your existing line of credit. An additional cardholder is not responsible for any charges made on the credit card even though his or her name appears on the credit card. This responsibility remains with the primary cardholder and a cosigner, if any. However, in case of a joint account all cardholders are responsible for all charges. To obtain an additional card contact the issuer of your credit card.