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Merchant & POS
Visa's Merchant Data Standards Manual covers classification, identification and data standard requirements for merchants, payment facilitators and marketplaces, including merchant naming, location and MCC rules. Here is what it contains and where to find it.
EMV
The Visa EAS Server (Extended Access Service) is a server used in Visa’s authentication infrastructure. It was developed to run the cardholder authentication process securely between banks and the Visa network, particularly within Visa Secure (3-D Secure 2.x).
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.
Merchant & POS
Mail order is carried out by conveying credit card details to the merchant by phone or mail. A manual sale occurs when, due to a physical problem during checkout, the card details are entered into the POS device by hand instead.
Merchant & POS
When a chip can't be read due to a chip fault or the card being inserted incorrectly, the transaction is completed by swiping the magnetic stripe on the right side of the POS. Can chipless cards do fallback?
Laws & Regulations
The purpose of the Regulation on Bank Cards and Credit Cards is to set the procedures and principles for issuing and using bank and credit cards and for the activities of institutions in the card payment system.
Contactless
A TR Karekod transaction is a payment carried out using a QR code generated according to the procedures and principles in the regulation on the generation and use of the TR Karekod in payment services.
Debit Card
Debit cards and prepaid cards are generally closed to Mail Order transactions. The same usually applies to Non-3D (non-3D Secure) online transactions, which banks keep disabled by default to limit fraud risk.
ISO 8583
F19 — Acquiring Institution Country Code: the country to which the location of the acquiring bank's device (ATM, POS, etc.) belongs.
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.
Payment Systems
No. Besides the POS and the host, permissions can also be kept in the issuer data. This lets banks, for example, allow installments only for a brand's BINs, or allow mail order for credit cards but not debit cards.
3D Secure
Isbank (Turkiye Is Bankasi) has completed Europe's first migration to EMV 3D Secure 2.0, the current version of the 3D Secure authentication infrastructure used to verify cardholders in online card purchases. Deputy General Manager...