What is a Cardholder?
A cardholder is the authorized user of a credit card who has established a line of credit with the Issuer of the card. They are financially responsible for transactions against the card.
The individual whose name is embossed on a card (or Debit Card, as applicable) and any authorized user of such Card.
Electronic Merchant Systems Payment Processing Glossary :
Defining key payment processing and merchant services industry terms to help business owners make better decisions.