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Credit Card Glossary

Credit Card Glossary: Terms and Definitions

Confused by credit card terms? CreditCards.com's glossary of credit card definitions will help. From account holder to Regulation Z, we have defined the most-common and most-confusing credit card terms.

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PIN (personal identification number)
A PIN, or personal identification number, is a series of digits used to verify the identity of the holder of a card. The PIN is a kind of password. Consumers often may choose whether to authorize a debit card transaction by signature or PIN; while it may make no difference to consumers, the choice means they are choosing different transaction processing systems.