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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).
Payment Systems
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.
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?
Merchant & POS
The Merchant Registry System is the system at BKM that holds information on merchants accepting electronic payments, set up to simplify TR QR Code payment processes and prevent fraud and misuse in payments.
Security
With Chip&Pin technology, card PINs and chip-based transactions became widespread. As online shopping grew, strengthening the security of these transactions became a necessity, and OTP began providing that transaction security.
Online & Authorization
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.
Payment Systems
Here are the Mastercard and Visa chargeback reason codes that require a cardholder letter and/or supporting documentation, with their descriptions.
Merchant & POS
Let's first look at chargeback and refund: a chargeback returns the amount paid to a credit card when goods or services are not received, or when transactions not made by the cardholder are detected.
Credit Card
Card security is critical in card payment systems. Chip&Pin curbed much fraud, but gaps remain. Cornercard, Gemalto and Visa launched Switzerland's first credit card with a built-in fingerprint reader. Here is how it works.
ATM
EAST, originally the European ATM Security Team, is a non-profit organization working on ATM security. Founded in 2004, it later broadened its scope and became the European Association for Secure Transactions.
ATM
The shutter can be described as the gate mechanism that prevents financial loss during ATM cash deposit and withdrawal transactions by controlling customer access to cash and preventing tampering with the ATM system.
From My Readers
I occasionally receive questions from my readers, and I answer them by email or through other channels. Since others may have similar questions, I will publish these questions on my site along with the answers. Hello Mr. Arif, I read your articles from time to time and...