Laws & Regulations
What Is a Payment Service?
A payment service means the services offered under Article 12(1) of Law No. 6493. Essentially, it is delivering funds received from a sender to a recipient.
Search
"Account Information"
173 articles found
Payment Institutions & E-Money
What Is a Payment Institution? Which Services Can It Provide Under Law No. 6493?
A payment institution is a legal entity authorized under the Law to provide and execute payment services. It must be a joint stock company meeting the conditions in Article 14 of Law No. 6493. This post sets out the services listed in Article 12 and the exclusions.
Payment Institutions & E-Money
Communique on the Redetermination of Minimum Equity Amounts of Payment and E-Money Institutions Published
The CBRT published its Communique on the Redetermination of the Minimum Equity Amounts of Payment and E-Money Institutions in the Official Gazette. The new amounts apply from 30 June 2025.
Chargeback
What Are the American Express Chargeback Reason Codes?
Chargeback reason codes vary by card scheme. The Amex chargeback reason codes and their descriptions are listed below: American Express Chargeback Reason Codes A01 The charge you submitted did not receive a valid authorization approval code for the amount...
Online & Authorization
What are EMV Tags?
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.
ISO 8583
ISO 8583 Field Descriptions (F12)
DE 12-TIME, LOCAL TRANSACTION: the local time at which the transaction took place at the point of transaction (ATM, POS). 6 digits, hhmmss format. F12 differs from F7 (Transmission Date and Time).
Payment Systems
Where Can I Find All the Details About New-Generation Cash Registers (ÖKC)?
New-generation payment recording devices (ÖKC) now play an important role for businesses and sole proprietors. The Revenue Administration's site covers both the legislation and usage details.
FAST
Can an Easy Address Defined at One Bank Be Defined for an Account at Another Bank?
Yes. To change the account an Easy Address is linked to, log in through the other bank's channel and create a new Easy Address definition. From that moment on, the old definition at the previous bank becomes invalid.
ISO 8583
ISO 8583 Field Descriptions (F2)
F2 is the Card Number field in ISO 8583, identifying the cardholder and issuing bank. This post covers its structure, the 8-digit BIN update, field format, first-digit scheme identification, and PCI DSS security requirements.
Fraud
What is a Man-in-the-Middle Attack (MITM)?
A man-in-the-middle attack is a method in which an attacker inserts themselves between the server and client to intercept users' information, steal passwords, and gain access to accounts on a local network. This fraud mostly occurs over public internet connections.
Merchant & POS
What Is Dynamic Verification?
Dynamic verification means that, in a payment initiated with a dynamic QR code, transaction-specific details such as the recipient's name, account number and amount are verified online by the receiving participant at the time of the transaction.
ATM
What Should We Pay Attention to When Using an ATM?
Because the ATM is the channel where customers physically handle cash, fraud cases happen there very often. Here are the precautions you can take to use ATMs safely.