![]() ![]() The single-digit checksum is used to validate the credit card number. The individual account identification number is unique to each credit card holder, and is used to identify the cardholder's account. This number determines the institution that issued the credit card to the cardholder. ![]() The issuer identification number, or IIN, is the first six digits of the credit card number. An individual account identification number.Six digits issuer identification number (IIN).Additionally, the credit card number must be embossed on the card and must be printed on the statement.Ī valid credit card number must contain some essential fields in order to comply with the ISO/IEC 7812 numbering standard. The expiration date must be valid and the cardholder's name must be embossed on the card. There are a few other things to consider when determining if a credit card number is valid. The number must be entered correctly in order to be processed. What counts as a valid credit card number?Ī valid credit card number is one that is issued by a financial institution and is used to purchase goods or services. ![]()
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