Merchant & POS
Can I Make Transactions with Any Card on a POS Terminal?
To accept a card brand such as Mastercard or Visa, a POS must be certified for that brand. Which brands a POS accepts is the bank's decision.
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"authorization approval"
85 articles found
Online & Authorization
Error Codes Used in Authorization Transactions and Their Explanations
A reference guide to authorization response codes seen on POS and ATM transactions, with plain-language explanations of what each code means and what to do about it.
Payment Systems
What is Takasbank?
Takasbank (Istanbul Settlement and Custody Bank) exists to increase the competitiveness of Turkey's markets by providing clearing and custody services, financial services, and other economic activities under the relevant legislation.
ISO 8583
What Fields Make Up ISO 8583?
We covered the ISO 8583 basics in an earlier article. This post explains the ISO 8583 message structure in detail: every ISO 8583 message consists of three main parts - the MTI (Message Type Indicator), the Bitmap, and the Data Elements.
Online & Authorization
How does the international transaction flow work?
When a card transaction is made abroad, banks usually calculate the cost from a percentage commission, a fixed commission, and an exchange rate margin. The flow starts when the customer requests a cash withdrawal at a foreign ATM.
Merchant & POS
What is the Personal Data Protection Law (KVKK)?
The Personal Data Protection Law was adopted by the Grand National Assembly of Turkey on 24/03/2016 and published in Official Gazette No. 29677 on 07/04/2016. It protects individuals' rights in the processing of personal data and sets the rules that data controllers must follow.
HCE
What Are Tokenization and Detokenization?
Tokenization generates secure data from a credit card number, using specific algorithms, for use during authorization. In CNP transactions, it removes the risk of storing or compromising the original card number.
EMV
What is the External Authenticate Command?
The EXTERNAL AUTHENTICATE command asks the application inside the ICC whether it can verify the cryptogram, and the ICC returns the processing status. Below are the components of the External Authenticate command and what issuer authentication means.
Chargeback
What Are the Domestic Exceptions to Chargeback Rules?
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.
Chargeback
What Is Compliance (Regulatory Compliance)?
Compliance means adherence to card scheme rules. Outside chargebacks, it is how a bank that loses money because card payment organization rules were broken recovers that amount from the party that caused the loss.
Payment Institutions & E-Money
Amendments Made to the Communiqué on Information Systems of Payment and Electronic Money Institutions and Data Sharing Services of Payment Service Providers
On 7 October 2023, the CBRT amended the Communiqué on Information Systems of Payment and E-Money Institutions and Data Sharing Services of Payment Service Providers, first published on 1 December 2021. Links to the new text, a comparison table and a detailed summary of changes follow.
Payment Systems
Communiqué on Replacing Old-Generation Payment Recorder Devices with New-Generation Devices Published
With its announcement of 30/11/2023, the Revenue Administration published a draft Tax Procedure Law General Communiqué to complete the replacement of old-generation payment recorder devices (EN OKC) with new-generation ones (YN OKC), reduce cash use and increase card payment options.