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Laws & Regulations
This guide, aligned with the TR QR Code regulation and its annex, describes the workflows for FAST payments using merchant-presented and person-to-person QR codes and defines the related TR QR Code data organization.
Credit Card
It may sound impossible at first, but it is technically possible: a bank can issue chip debit cards under the same BIN as its magnetic stripe cards, with the card scheme's approval.
Credit Card
A special data set printed on a card's magnetic stripe, containing the card information required for authorization when the card is used physically. It consists of 40 numeric characters. The Track2 field structure includes several data fields such as length and description.
Credit Card
iCVV stands for Integrated Circuit Card Verification Value. To prevent fraud, it is a CVV value generated similarly to the card's track data and stored on the card's chip. Visa uses the term iCVV; MasterCard and American Express use their own equivalents.
Credit Card
CVV is short for Card Verification Value, a term used by Visa. CVC is short for Card Verification Code, a term used by MasterCard. The CVV/CVC code is used for cardholder verification and to reduce fraud risk.
Merchant & POS
TR QR Code refers to QR code information created according to the regulation on generating and using the TR QR code in payment services, which can be used in payments under Law No. 6493.
Payment Systems
According to BKM's TR QR Code Technical Principles and Rules Guide for card payments, QR code payment structures apply to EFTPOS, shared EFTPOS, ÖKC, ATMs, payment provider apps, static QR codes and virtual POS.
Payment Systems
The Address Verification Service (AVS) is a fraud prevention system that, when used effectively, can help limit fraud and chargebacks. This post lists the AVS response codes used by AMEX, Mastercard and Visa, with a description of each.
Merchant & POS
MCC stands for Merchant Category Code: a 4-digit code used to classify merchants by business type. Codes differ slightly between Mastercard, Visa, and BKM.
Chargeback
The MasterCard and Visa chargeback reason codes that always, sometimes or never require a draft retrieval before a chargeback, with their descriptions. Includes Visa codes such as 60, 75, 79 and 81 and MasterCard codes 4801 and 4802.
Payment Institutions & E-Money
5 August 2021 was a very important day for Turkish payment systems. The CBRT's amendment to the Communiqué on the International Bank Account Number (IBAN) allows payment institutions and e-money institutions to create IBANs as well. This is...
Online & Authorization
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.