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Diagram illustrating the ISO 8583 F42 card acceptor identification code field

ISO 8583

ISO 8583 Field Descriptions (F42)

F42 - CARD ACCEPTOR IDENTIFICATION CODE: the merchant number of the terminal where a transaction took place. It is a 15-character alphanumeric value. Transactions are settled to the merchant's account based on the merchant number in this field.

Merchant choosing between a bank POS and a virtual POS service

Merchant & POS

Is it mandatory to work with a bank to get a POS terminal?

The answer depends on the type of POS terminal. A physical POS (GPRS, Dial-Up, IP, or cash-register POS) requires working with a bank. A virtual POS can also be obtained from a payment institution without a separate bank agreement.

Diagram of the Chargeback Document Management System (CDYS) process flow

Credit Card

What is the Chargeback Document Management System (CDYS)?

The Chargeback Document Management System (CDYS) is a system developed by BKM to resolve customer disputes over card payment transactions among BKM members, covering Copy Request, Chargeback, Representment, and related processes.