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Diagram of the TR QR Code payment flow between cardholder, issuer, BKM and acquirer

Payment Systems

Why Am I Getting an Error When I Try to Pay with a TR QR Code?

In payment or cash withdrawal transactions, the TR QR Code is generated by the POS or ATM. The card issuing bank must build its systems to read and act on this code. Errors usually stem from mishandling the long and short QR code flows, which are explained here.

Illustration explaining the POS cashback feature

Merchant & POS

What is POS Cashback?

Cashback is a modern POS terminal service that allows cash to be withdrawn from the merchant's till while paying for goods and services. Although cashback is a feature specific to debit cards, you can also withdraw cash from an ATM...

Central Bank of the Republic of Turkey and BKM logos

Payment System Institutions

Central Bank Becomes a Partner of BKM

According to the CBRT's official website, the Central Bank of the Republic of Turkey has become the controlling shareholder of the Interbank Card Center (BKM), using the authority granted by Law No. 7192.

Diagram illustrating the EMV Tag-Length-Value (TLV) data structure used in card transactions

Online & Authorization

What are EMV Tags?

In EMV, data is stored in Tag-Length-Value (TLV) format, and it is carried between the card, the POS terminal, and the authorization system in this same format. This post lists every EMV Tag, its type, and its description.

Diagram showing different types of POS terminals used for card payments

Merchant & POS

What Is a POS (Point of Sale)?

Virtual or electronic authorization devices connected to a bank, used by merchants to accept card payments. The term comes from the English phrase Point of Sale. Covers POS types by communication method, their advantages, who can use one, and the transactions a POS can perform.

European Payments Initiative (EPI) overview graphic

Payment System Institutions

What is EPI (European Payments Initiative)?

The European Payments Initiative (EPI), formerly known as PEPSI, is an ECB-backed payment integration initiative aiming to build a pan-European payment system and interbank network to rival Mastercard and Visa. Its founding members include BBVA, BNP Paribas, CaixaBank, Commerzbank and others.

Cover page of the CBRT guide linking payment business models to payment service types

Payment Systems

Guide Linking Payment Business Models to Payment Service Types Published

This Guide links business models frequently encountered in the payments field to the payment services listed in Law No. 6493 on Payment and Securities Settlement Systems, Payment Services and Electronic Money Institutions, and aims at uniformity in practice.

Illustration for the question about SMS notifications in mail order transactions

From My Readers

Is there an SMS notification structure for Mail Order transactions?

I occasionally receive questions from my readers, and I answer them by email or through other channels. Since others may have similar questions, I will publish these questions on my site along with the answers. Hello Mr. Arif, I read your articles from time to time and...