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Open Banking
EPSM is a non-profit trade association that represents its members' interests and enables the exchange of news, information and opinions about the European payments market.
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.
Credit Card
In the world of payment systems, just as credit cards are an indispensable product, a payment scheme is indispensable for credit cards. When a credit card product is launched, the scheme it will be issued under is decided first.
ATM
ATMs generally hold your bank/credit card inside the card reader slot until the transaction is completed. Fraudsters insert foreign objects such as paper or adhesive-coated cards into the reader to trap the customer's card inside.
ISO 8583
Fields F4, F5, F6, F49, F50, and F51 are the Amount and Currency fields sent in the authorization message. For example, for a 300 Euro transaction, the amount and currency information sent in these fields is as follows.
Agentic Commerce
The next customer on the internet may not be human. If AI agents become part of purchasing decisions, the rules of e-commerce, marketing, and payment systems could change.
Closed-Loop Payments
Is Starbucks really selling coffee, or building an ecosystem? Prepaid balances, a loyalty program and customer data turn a coffee chain's payments into a closed-loop economy, a very different model from Istanbulkart.
Merchant & POS
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
After switching to response code 70 for contactless limit-exceeded cases, we found that some overseas POS devices and acquirers did not handle it as expected. This post covers why the problem lies in the ecosystem and how to address it.
Merchant & POS
The Transaction Success Rate (TSR) is a key performance metric measuring the percentage of attempted payment transactions that complete successfully, and a critical indicator of overall payment health.
Payment Systems
Couriers are used to physically deliver cards (credit, debit, prepaid) to customers. Here is a brief look at the card's life cycle, from application and printing to courier sorting and final delivery.
Credit Card
KKB was established, under banking law, to enable the exchange of all kinds of information and documents among at least five banks, and it also shares credit information about customers. The Credit Bureau of Turkey also serves deposit banks, participation banks, financial institutions, and more.