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ISO 8583
F25 - POINT OF SERVICE (POS) CONDITION CODE is the field that defines the condition under which a POS transaction was performed. Possible values include 00 Normal presentment, 01 Customer not present, 02 Unattended terminal, and more.
Credit Card
SDA (Static Data Authentication), DDA (Dynamic Data Authentication), and CDA (Combined Dynamic Data Authentication) are offline data authentication methods used in chip cards. Learn how each one validates the card and the transaction.
Laws & Regulations
A payment institution is a legal entity that provides payment services for electronic payments through the infrastructure it offers. This article covers the Turkish regulatory framework, licensing, safeguarding, supervision, penalties and taxation.
Merchant & POS
AUC (Application Usage Control) specifies restrictions that limit an application by geography or by specific transaction types. It is a 2-byte data element in Tag 9F07. If present, the terminal performs checks such as whether the transaction is at an ATM.
Merchant & POS
MPV stands for Merkezi POS Veritabanı (Central POS Database), BKM's shared database of all POS terminals operated by its card-accepting members, used for support, statistics, fraud analysis and the Common POS Management System.
Online & Authorization
Below are the possible response code values for offline transactions and their explanations: Response Code / Explanation - Y1: Approved offline, Z1: Declined offline, Y2: Approved after referral, and more.
Merchant & POS
It's important to first distinguish between magnetic-stripe and fallback transactions. A magnetic-stripe transaction skips the chip entirely, which lowers its security level compared to a fallback transaction.
Payment Systems
After Russia invaded Ukraine, Visa and Mastercard suspended services for sanctioned Russian banks. This post explains the impact on cardholders and merchants, and Russia's MIR and UnionPay alternatives.
Merchant & POS
All banks report the POS and merchant data they allocate to customers to BKM's MIV and MPV systems, which BKM then reports. These notifications include merchant and POS location details such as address, province, and district.
Merchant & POS
The GPRS Line Fee is the monthly charge banks pass on to merchants for each active GPRS POS terminal, covering the mobile operator cost of the line built into GPRS POS devices. It is not applied to IP POS or Dial-up POS terminals.
Merchant & POS
There are many players in the POS and OKC (Payment Recording Device) market in Turkey. Some of these companies are foreign, while others are domestic. Let's get to know these companies: Ingenico, Verifone, Interpay (PAX), and more.
Payment Systems
One of the most notable recent developments in card payments is that contactless limits are no longer fixed and can be managed dynamically per customer. Mastercard and Visa are taking different but complementary approaches, and ISO 8583 may need to evolve with them.