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EMV chip card illustration

Online & Authorization

What is EMV?

EMV stands for Europay, Mastercard and Visa. In 1994 these companies formed a working group to set chip-card standards, leading to the EMV standards used worldwide today.

ISO 8583 field 35 Track 2 data

ISO 8583

ISO 8583 Field Descriptions (F35)

The card's Track 2 data is carried in this field. Track 2 data contains information such as the card number, expiry date and service code.

Diagram explaining the MCC merchant category code field in ISO 8583 messages

ISO 8583

ISO 8583 Field Descriptions (F18)

F18-MERCHANT TYPE: This is the merchant's category code (MCC) information. It must contain values from the Mastercard or Visa MCC Code list. It is a 4-digit numeric value. For ATM transactions, MCC code 6011 should be sent. The role of MCC in authorization...

ISO 8583 field 19 acquiring institution country code

ISO 8583

ISO 8583 Field Descriptions (F19)

F19 — Acquiring Institution Country Code: the country to which the location of the acquiring bank's device (ATM, POS, etc.) belongs.

Illustration representing a payment card's transaction history

Credit Card

What Is a Card's First Transaction Date? What Is It Used For?

Banks generally keep a record in the system of a card's "First Transaction Date." This information is automatically populated by the online authorization system. So under what circumstances is it updated? First, an authorization transaction must…

European Association for Secure Transactions EAST

ATM

What Is the European ATM Security Team (EAST)?

EAST, originally the European ATM Security Team, is a non-profit organization working on ATM security. Founded in 2004, it later broadened its scope and became the European Association for Secure Transactions.

Diagram of the committees within the BKM system

Payment System Institutions

What are the committees in the BKM system?

BKM (Interbank Card Center) works through several committees: Security, Operations and Technology, Market Development, Business Development, Chargeback Rules and Arbitration, ATM Sharing, plus arbitration committees. This post outlines each one's duties.

Photograph of a POS terminal used for Chip and Pin card payments

Merchant & POS

What is Chip&Pin?

Chip&Pin, introduced in Turkey on March 31, 2006, is a payment method that greatly reduces the risks of card copying and loss or theft fraud. The chip on the card reduces copying risk, while the 4-digit PIN prevents unauthorized use of a lost card.

Illustration representing electronic payment systems

Payment Systems

What are Payment Systems?

Let's talk about payment systems, which we have heard more about since the internet entered our lives, and the basic structures behind them. The first credit card in the world was used in America in the 1920s.

Diagram illustrating the PIN Try Counter concept on a payment card chip

Credit Card

What Is PIN (Personal Identification Number) Try Counter?

The PIN Try Counter is a value stored on the card's chip showing the number of remaining offline PIN attempts. Each incorrect offline PIN entry decreases it by 1, and it resets when the correct PIN is entered.