A credit card is part of a payment system made via the use of a plastic card issued to users. Credit card users are entitled to buy goods and services based on the promise to pay for these goods and services. The issuer of the card grants a line of credit to the consumer or user from which the user can borrow money for payment to a merchant or as a cash advance to the user. Credit cards are issued after an account has been approved by the credit provider, after which cardholders can use it to make purchases at merchants accepting that card. There are various types of electronic verification systems, which allow merchants to verify that the card is valid and the credit card customer has sufficient credit to cover the purchase, all of this just in a few seconds at time of purchase. Monthly, the credit card user is sent a statement indicating the purchases undertaken with the card together with any other outstanding fees, and the total amount owed. After receiving the statement, the cardholder may dispute any charges might be incorrect. Otherwise, the cardholder will have to pay a defined minimum proportion of the bill by a due date, or may choose to pay a higher amount up to the entire amount owed. There are many credit card issuing circuits, which are associated with national and international banks, the more frequently used associations are American Express, Visa and Mastercard.