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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?
EMV
The Visa EAS Server (Extended Access Service) is a server used in Visa’s authentication infrastructure. It was developed to run the cardholder authentication process securely between banks and the Visa network, particularly within Visa Secure (3-D Secure 2.x).
ATM
Banks must provide the infrastructure for ATM access by visually impaired customers. Among ATMs side by side or less than 50 meters apart, only one needs to comply; all other ATMs must serve visually impaired customers. Details of Article 7 are below.
HSM & Security
In the past, banking meant going to a branch. Today, most transactions run through channels such as the Internet Branch, ATM and Mobile Branch, so improving internet banking security and regularly informing customers about it is important.
Laws & Regulations
No. Under Law No. 6493, a payment system is a structure completely different from a payment institution and requires CBRT permission. Using such a name without permission can lead to criminal penalties.
Payment Systems
Published in the Official Gazette of 25.11.2022, six days before the Transition Period ended, an amending Regulation and Communiqué extended the transition period for some obligations of payment and e-money institutions from 01.12.2022 to 28.02.2023.
HSM & Security
TPK stands for Terminal PIN Key. It is a data encryption key used to encrypt PINs for transmission between a terminal and the terminal's bank (acquirer) within a local network. Learn how TPK is used in POS and ATM devices.
Credit Card
This communiqué sets the rules for managing information systems used in bank card and credit card transactions. Card scheme operators, issuers, acquirers, merchants and outsourced service providers are all within its scope.
FAST
Current information: This post describes the limit in effect at the time of publication. The FAST transaction limit, introduced in January, was raised periodically and reached 1,000 TL as of January 29. See the newer post for the current FAST limit.
Credit Card
Due to how payment systems work, authorization is obtained first for a transaction. For a Not Onus transaction (where the card-issuing bank and the POS bank are different), the system waits for the relevant transaction to arrive via the clearing incoming file…
Laws & Regulations
The purpose of the Regulation on Bank Cards and Credit Cards is to set the procedures and principles for issuing and using bank and credit cards and for the activities of institutions in the card payment system.
Chargeback
A chargeback is the refund of an amount paid by credit card to the cardholder's card when the purchased goods or services were not received, or when a transaction was not actually carried out by the cardholder.