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Merchant & POS
In EMV-based debit card transactions, PIN verification is decisive for both security and liability. What happens when a card that only supports online PIN is sent to the issuer without a PIN, and the issuer approves it? Who owns the risk?
Payment Systems
The rules in this guide relate to the processing of Transactions and Payment Transactions made with Mastercard-branded cards. Here are the key definitions and where to find the document.
Payment Systems
Foreign Currency POS is the POS software that lets merchants process transactions in a foreign currency. Terminals without it can only collect payments in Turkish lira. It comes in two common forms: Multicurrency POS and DCC POS (Dynamic Currency Conversion).
Credit Card
The following steps should be followed when launching a new product: decide on the brand, request a new BIN from the scheme (Mastercard, Visa, Troy), define the BIN in the bank's system, generate keys in the HSM, and roll it out after certification.
Open Banking
No. Under the BRSA communiqué on service model banking, service banks can provide service model banking only to interface developers resident in Türkiye.
Credit Card
In online transactions, a one-time 3D Secure password is sent to the cardholder's phone. Find out who is liable if that password is shared with someone else, and what happens when a transaction is not completed with 3D Secure.
Credit Card
Yes. Your credit card limit can be reduced without your permission and approval. Banks may set a lower limit as a result of updates based on a person's economic and social situation, credit score and similar information.
Online & Authorization
Many fields are sent in the authorization message of a card transaction, one of the most important being the authorization code. On its own it is not enough; together with the STAN and transaction date, the transaction can be found directly.
Payment Systems
The MasterCard and Visa Chargeback Reason Codes Requiring a Written Merchant Rebuttal are listed below. Visa: Supporting documentation (sales drafts, contracts, proof of delivery) always strengthens the case. Codes include 30, 41, 53, 57, 75, 80, 85, 86 for Visa and 4831-4863 for MasterCard.
Payment Systems
Here are the Mastercard and Visa chargeback reason codes that require a cardholder letter and/or supporting documentation, with their descriptions.
Payment Institutions & E-Money
Under the Law on Payment Services and Electronic Money Institutions, the organs, duties and powers, and working principles of the Payment and Electronic Money Institutions Association of Turkey have been determined. The statute is now in force.
Debit Card
When we think of online shopping, we usually picture paying with a credit card. But can customers without a credit card, only an ATM card, shop online? Of course they can — you don't need a credit card to enjoy the convenience of e-commerce.