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Merchant & POS
An offline transaction is one approved by the card and the POS themselves, without going to any system (the card's bank or the POS's bank), when a chip card transaction is made at a POS. For this reason, some sectors considered risky are restricted.
Credit Card
With the advancement of technology, the use of credit cards in online transactions and the variety of payment methods have increased. To make an online transaction with a credit card, you need: Card Number, Expiration Date, and CVV2 (the 3-digit number on the back of the card).
Merchant & POS
Since the MCC code is a merchant's category code, it's critical for the checks performed during merchant onboarding and authorization, including campaigns and restrictions.
Payment Systems
In payment or cash withdrawal transactions, the TR QR Code is generated by the POS or ATM. The card issuing bank must build its systems to read and act on this code. Errors usually stem from mishandling the long and short QR code flows, which are explained here.
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.
HSM & Security
HSM, short for Hardware Security Module, is specialized security hardware built to store sensitive cryptographic keys in a physical environment and to perform cryptographic operations in the most secure way.
Security
Credit cards are one of the most important payment instruments in daily life. As technology advances and mobile payments and ATMs handle nearly all transactions, credit card fraud is also diversifying and increasing.
Cryptocurrency
Mining is the production of cryptocurrency through hardware and software, as well as the recording and confirmation of cryptocurrency transfers. Because block difficulty rises with each new unit, mining requires very powerful processors.
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...
EMV
The Lower Consecutive Offline Limit is the maximum number of consecutive offline transactions allowed by the ICC application, as set by the issuer, on a terminal capable of going online. It is sent in tag 9F14.
Cryptocurrency
Cryptocurrencies are becoming part of everyday life and are expected to compete seriously with card payments. This glossary explains the key crypto terms, from address, altcoin and arbitrage to halving, mining, proof of stake and stop-loss.
Fraud
Fraud management is used to detect possible fraud on customer accounts and provides additional security for transactions when necessary, making it one of the top priorities for banks.