Cardholder
The person holding a debit, credit or charge card issued by a financial institution
PAN
Primary Account Number
card number
Retailer/Merchant
A merchant sells goods or services to a customer (cardholder)
Acquirer
A merchant will have negotiated a merchant service agreement with its acquirer to process payment card transactions on its behalf.
Card Schemes
Organisations that manage and control the operation and clearing of card payment transactions according to card scheme rules
Visa, MasterCard, Etc
Issuer
The bank, building society or financial institution that provides payment cards to their customer or cardholder.