![]() The transaction data contains information derived from the card (e.g., the card number or card holder details), the terminal (e.g., the terminal number, the merchant number), the transaction (e.g., the amount), together with other data which may be generated dynamically or added by intervening systems. Part 3: Maintenance procedures for the aforementioned messages, data elements and code values Ī card-based transaction typically travels from a transaction-acquiring device, such as a point-of-sale terminal (POS) or an automated teller machine (ATM), through a series of networks, to a card issuing system for authorization against the card holder's account.Part 2: Application and registration procedures for Institution Identification Codes (IIC).Part 1: Messages, data elements, and code values.The ISO 8583 specification has three parts: These fields are used by each network to adapt the standard for its own use with custom fields and custom usages. It defines many standard fields (data elements) which remain the same in all systems or networks, and leaves a few additional fields for passing network-specific details. In particular, the Mastercard, Visa and Verve networks base their authorization communications on the ISO 8583 standard, as do many other institutions and networks.Īlthough ISO 8583 defines a common standard, it is not typically used directly by systems or networks. The vast majority of transactions made when a customer uses a card to make a payment in a store ( EFTPOS) use ISO 8583 at some point in the communication chain, as do transactions made at ATMs. ISO 8583 defines a message format and a communication flow so that different systems can exchange these transaction requests and responses. It is the International Organization for Standardization standard for systems that exchange electronic transactions initiated by cardholders using payment cards. ISO 8583 is an international standard for financial transaction card originated interchange messaging. ![]()
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