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Chargeback
A chargeback is the process of requesting that an amount paid by credit card be refunded, either because the goods or services paid for were not received, or because a transaction is identified as one the cardholder did not carry out.
ISO 8583
We covered the ISO 8583 basics in an earlier article. This post explains the ISO 8583 message structure in detail: every ISO 8583 message consists of three main parts - the MTI (Message Type Indicator), the Bitmap, and the Data Elements.
Payment Systems
In card payment transactions made via a physical POS device, entering the card's PIN keeps the transaction secure, while in virtual POS transactions, security is provided through the 3D Secure flow. Are 3D Secure payment methods standardized? There are 3 different 3D Secure models.
Laws & Regulations
The Regulation amending the Regulation on Program of Compliance with Obligations of Anti-Money Laundering and Combating the Financing of Terrorism has been published. It introduces financial group compliance rules, a deputy compliance officer and wider scope.
Merchant & POS
A reader asks whether a payment request taken at a customer's request should be sent as an e-commerce transaction, and what really separates Mail Order from E-commerce authorization.
Online & Authorization
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.
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.
Laws & Regulations
A payment institution is a legal entity that provides payment services for electronic payments through the infrastructure it offers. This article covers the Turkish regulatory framework, licensing, safeguarding, supervision, penalties and taxation.
Credit Card
When I think back to the Akbil I used when I first arrived in Istanbul, I think it's fair to say that Istanbulkart has undergone a very significant transformation. Users can now track activity, top up and view balances right from their phones.
Merchant & POS
When a chip can't be read due to a chip fault or the card being inserted incorrectly, the transaction is completed by swiping the magnetic stripe on the right side of the POS. Can chipless cards do fallback?
Merchant & POS
Mail Order (Mail Order/Telephone Order) is a transaction made by selecting the Mail Order option on a POS or through the virtual POS interface, entering the card number, expiration date, and CVV2. It is typically used when the cardholder is not present.
Payment Institutions & E-Money
On 7 October 2023, the CBRT amended the Communiqué on Information Systems of Payment and E-Money Institutions and Data Sharing Services of Payment Service Providers, first published on 1 December 2021. Links to the new text, a comparison table and a detailed summary of changes follow.