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Fraud
In payment systems, fraud means using someone else's credit or debit card to carry out a transaction at a merchant or ATM, gaining unfair profit and causing loss to the real cardholder, the merchant, or the bank. Fraudsters…
HCE
Token types vary depending on the verification method used in a transaction. In offline transactions, general checks are performed by the mobile app and card reader without any verification in the card system. In online transactions, token verification is sent to and verified by the issuer.
Merchant & POS
In the first post I explained what closed-loop payment systems are and how they differ from open-loop ones. Many of the replies I received boiled down to one question: how do these systems actually work behind the scenes once a QR code is scanned?
Fraud
Fraud monitoring refers to tracking card transactions through scenarios to detect potential fraud and taking rapid action immediately before or after a transaction occurs - such as identifying a suspicious transaction, calling the customer, or temporarily blocking the card to prevent authorization.
Payment Systems
The Hidden Side of the Payments World. The words a person working in the payment systems industry hears most over a career are probably Visa, Mastercard, POS, debit card, virtual POS, acquiring and card issuing. Frankly, my own career did not unfold very differently from that journey...
Fraud
Fraud controls fall into two main types: application fraud controls, which check card and merchant applications, and transaction fraud controls, which monitor card and POS transactions.
FAST
The limit in FAST, the CBRT's new instant payment system launched on 8 January, started at 50 TL. It was raised to 250 TL on 14 January and 500 TL on 21 January, and will be raised to 1,000 TL on 28 January.
HCE
The HCE cloud-based security infrastructure consists of four main pillars: Tokenization, Risk Management, Session Keys, and User/Device Authentication. Tokenization indicates the type of token generation, and there are three different tokenization methods.
Security
Forgery in card payments means transactions made with card details without the cardholder's knowledge, or purchases with counterfeit or stolen cards. Merchants cannot eliminate fraud and chargeback risk, but they should aim to reduce it to reasonable levels.
Payment Systems
Contactless payment has greatly improved the user experience, yet its fixed transaction limit is a common complaint. Can this limit be managed dynamically per customer? This post covers the current situation, technical and regulatory requirements and the outlook.
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
In payment systems, an “appeal” is the process of objecting to the outcome of a transaction dispute. It is usually discussed alongside chargebacks, but it plays a critical role in interbank dispute resolution, when a party asks the card scheme to re-evaluate a concluded decision.