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Credit Card
When payment systems come to mind, credit cards are usually the first thing people think of. Credit cards are produced according to specific standards, both in visual design and during printing. These standards belong to the ISO/IEC 781X family.
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.
Credit Card
Most of us remember the impact the first iPhone, introduced by Steve Jobs on January 9, 2007 and revolutionary for its time, had on our lives. In a similar way, a product that will completely change how we use and view credit cards...
ATM
In payment systems, the Greedy Algorithm is used to give the customer the minimum number of banknotes when withdrawing cash from an ATM. The algorithm used varies from bank to bank, since ATM cash capacity and transaction volume differ. For example...
Merchant & POS
QR code payments are growing, but without a common QR structure each code only works locally. EMVCo published a standard QR data structure so all payment schemes can share one QR code format at merchants.
Security
These are passwords generated for one-time use and sent to the cardholder's phone to verify card transactions in payment systems. The password sent during a 3D Secure transaction is a common example.
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.
Merchant & POS
Doctor POS devices are POS terminals designed for physicians, dentists, and veterinarians who are income taxpayers, meeting the requirements set out in the General Communique of the Tax Procedure Law (VUK).
Merchant & POS
In payment systems, every exchange between POS devices and bank or payment institution systems runs on a specific messaging standard, generally based on ISO 8583. However, each country, bank, or switch network defines its own version of this standard.
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.
Chargeback
The chargeback dispute period varies by reason, but it can never exceed 540 days from the date a transaction posted to the card. Within that limit, cardholders generally have up to 120 days to dispute, depending on the type of issue.
Credit Card
A single BIN cannot be used to issue both a credit card and a debit card. If a bank offers both products, it has at least two different BINs, allocated and announced separately by card type.