A credit card agreement is defined as the written document or documents evidencing the terms of the legal obligation, or the prospective legal obligation, between a card issuer and a consumer for a credit card account under an open-end (not home-secured) consumer credit plan.
A cardholder agreement is a legal document outlining the terms under which a credit card is offered to a customer. Among other provisions, the cardholder agreement states the annual percentage rate (APR) of the card, as well as how the card's minimum payments are calculated.
The credit agreement tells you what rate of interest is being charged and when it will be added to your account.