ISO 8583
ISO 8583 Field Descriptions (F45)
F45 (TRACK-1 DAT) carries the Track 1 data of the card in ISO 7813 format, including field separators and start and end sentinels but excluding the LRC character. It is 76 characters long.
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"Cardholder"
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ISO 8583
ISO 8583 Field Descriptions (F42)
F42 - CARD ACCEPTOR IDENTIFICATION CODE: the merchant number of the terminal where a transaction took place. It is a 15-character alphanumeric value. Transactions are settled to the merchant's account based on the merchant number in this field.
Payment Systems
Preventing Financial Losses in Payment Systems: Authorization, Clearing, and the Reversal Mechanism
Every payment transaction completes in seconds, yet dozens of controls run behind the scenes. This post covers the precautions for authorization and clearing, the critical role of reversals, and the financial loss scenarios most often seen in the field.
Payment Systems
What is Foreign Currency POS? What are the key points?
Foreign Currency POS is the POS software that lets merchants process transactions in a foreign currency. Terminals without it can only collect payments in Turkish lira. It comes in two common forms: Multicurrency POS and DCC POS (Dynamic Currency Conversion).
Payment Systems
What are the 3D Secure Payment Models?
In card payment transactions made via a physical POS device, entering the card's PIN keeps the transaction secure, while in virtual POS transactions, security is provided through the 3D Secure flow. Are 3D Secure payment methods standardized? There are 3 different 3D Secure models.
Online & Authorization
Is Entering the Name and Surname Mandatory on the Payment Page?
The payment page is one of the most important steps in whether customers complete a purchase. Asking for the cardholder's name is common practice, but it is not required to charge the card.
Security
What is Access Security Control (ACS)?
Access Security Control (ACS) is the security protocol that the card-issuing bank must maintain in 3-D Secure to support cardholder authentication, functioning as a complete authentication solution for issuers and payment processors.
Merchant & POS
What Is Opt Out?
In online transactions, Opt Out is the cardholder exercising the right not to enroll in 3D Secure. It is not unlimited: only as many transactions as the issuer allows can be made without 3D Secure.
Payment Systems
What is Strong Customer Authentication (SCA)?
Strong Customer Authentication (SCA) is a security requirement introduced under the EU's Payment Services Directive 2 (PSD2) to increase security and reduce fraud in online payment transactions. SCA requires two of three independent authentication factors.
Credit Card
What Is a Wallet?
The term 'wallet' has many definitions in payments and fintech. In general, it refers to digital wallets (e-wallets) used in e-commerce, popular because they let users securely store payment information and pay easily.
Merchant & POS
What Are the Card Capture Error Codes?
Response codes returned on payment transactions are critical for managing next steps. Curious which error codes trigger card capture? Under ISO 8583, codes 04, 07, 33, 34, 36, 38, 41 and 43 all result in the card being captured.
Merchant & POS
How should we interpret the new regulation on merchant commissions?
The Central Bank of the Republic of Turkey has capped the commission banks charge merchants on credit card purchases, effective for transactions after November 1, 2019. What does this mean for cardholders and banks?