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Merchant & POS
In EMV-based debit card transactions, PIN verification is decisive for both security and liability. What happens when a card that only supports online PIN is sent to the issuer without a PIN, and the issuer approves it? Who owns the risk?
Payment Systems
Offline transaction parameters are divided into two types: contact offline and contactless offline. These parameters can be managed separately through Terminal data and Chip data. Offline transactions can be reported to the HOST after an online transaction, after X occurrences, and more.
Merchant & POS
No. Besides the terminal data, contactless limits can also be managed from the chip data. A “Use Merchant Contactless Limits” field decides which set of limits the POS applies.
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.
Credit Card
First, let's cover what the security code is: a 3-digit numeric value generated during card printing and printed on the card to verify the cardholder and reduce fraud risk. This value is called CVV2/CVC2.
Security
Published by the PCI SSC, Software-based PIN Entry on COTS (SPoC) is a standard that provides a software-based approach for protecting PIN entry on commercial off-the-shelf devices such as smartphones and tablets.
Merchant & POS
AFL (Application File Locator) is the field that shows where on the card the data needed for the authorization transaction is located. AFL is a list of the application data records on the card, and the terminal uses it to read the application data.
Online & Authorization
TLV is a data storage method used to speed up the parsing of data. For example, reading data from a card's chip at a POS and carrying it through authorization uses the TLV structure.
Credit Card
The Application Interchange Profile indicates the application functions supported by the card. The AIP values and their descriptions are given below. Where is the AIP found? The AIP is a 2-byte piece of data stored on the card, carried under EMV tag 82.
Merchant & POS
Contains the EMV steps performed by the Terminal in a transaction. The TSI fields, their possible values, and descriptions of the values are shown below.
ISO 8583
F55 - INTEGRATED CIRCUIT CARD (ICC) SYSTEM RELATED DATA: the field where EMV data is written on chip cards. It consists of components such as Position, Private Data Subelements, PDS Tag, PDS Length, and PDS Value...
Merchant & POS
The floor limit is the value held on the POS that determines the maximum amount for which an offline transaction can be approved. It is managed per terminal and can be updated at any time through the POS parameter management system.