Merchant & POS
Don't Dismiss the POS Receipt
In daily credit card purchases, the POS produces two receipts: the Customer Copy and the Merchant Copy. The cardholder gets the customer copy; the merchant keeps its own copy by law.
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"Visa Mastercard"
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Credit Card
What is Emboss Name?
The customer's name printed on credit and debit cards is called the emboss name. But can we print an unlimited amount of name information on the card? There is a specific area reserved on the card for it.
Credit Card
What Is an Amex (American Express) Card?
Amex is short for American Express, a payment scheme like Mastercard, Visa, or TROY. Learn its history, what sets Amex cards apart, and whether every website accepts them.
Merchant & POS
What Is an MCC (Merchant Category Code)?
MCC stands for Merchant Category Code: a 4-digit code used to classify merchants by business type. Codes differ slightly between Mastercard, Visa, and BKM.
ISO 8583
ISO 8583 Field Descriptions (F39)
F39 - RESPONSE CODE: This is the code showing whether the transaction was approved or declined. It is 2-digit alphanumeric. Typically 00 is sent when approved, and a decline reason code is sent when declined.
Credit Card
What is Stand-In Authorization?
In the standard authorization flow, the transaction is initiated by the acquirer (POS bank) and forwarded to the issuer (card-issuing institution). The process is completed once the issuer responds. However, this isn't always possible; when the issuer fails to respond, BKM steps in...
Payment Systems
When Does a Transit Card Become a Payment System? The Istanbulkart Example | #3
When Does a Transit Card Become a Payment System? Millions of people in Istanbul use Istanbulkart every day. Passing through metro turnstiles, rushing to a bus or boarding a ferry at the last moment, our hand reaches almost by reflex for our card or our phone...
Merchant & POS
What Happens Behind the Scenes When a QR Code Is Scanned? | Closed-Loop Payments #2
In the first post I explained what closed-loop payment systems are and how they differ from open-loop ones. Many of the replies I received boiled down to one question: how do these systems actually work behind the scenes once a QR code is scanned?
Payment Systems
Regulation Amending the Regulation on Payment Services, E-Money Issuance and Payment Service Providers Published
Official Gazette No. 32332 dated 07.10.2023 published the amending Regulation and Communiqué covering digital wallets, e-money, share transfers, cloud outsourcing, remote identity verification and card system choice.
Payment Systems
WhatsApp Payments Now Possible Without a Credit Card
WhatsApp, one of the world's leading messaging apps, is rolling out a long-awaited new feature. After the update, users in Brazil will be able to shop and pay from within the app. Meta announced that users can now pay small businesses directly in WhatsApp.
Credit Card
What Is MIR, the Russian Payment Scheme?
Mir means World and Peace. It is a national payment system established by a law adopted by the Central Bank of Russia on 1 May 2017. It is currently accepted mostly by Russia-based companies, but acceptance is gradually spreading.
Merchant & POS
How Should We Interpret the Regulation on the Non-Use of Crypto Assets in Payments?
The Regulation on the Non-Use of Crypto Assets in Payments, published in the Official Gazette on 16 April and effective from 30 April, looks set to seriously affect cryptocurrency developments in Turkey. Here are its key points and the full text.