HCE
What Is the ISO/IEC 14443 Standard?
An international standard that defines proximity cards used in Near Field Communication (NFC) and the protocols used to communicate with them. It has 4 parts; Part 4 covers NFC and HCE operations.
Search
"Payment Messaging"
65 articles found
Online & Authorization
What are EMV Tags?
In EMV, data is stored in Tag-Length-Value (TLV) format, and it is carried between the card, the POS terminal, and the authorization system in this same format. This post lists every EMV Tag, its type, and its description.
Online & Authorization
Error Codes Used in Authorization Transactions and Their Explanations
A reference guide to authorization response codes seen on POS and ATM transactions, with plain-language explanations of what each code means and what to do about it.
Credit Card
On the Issue with Visa Contactless Transactions Abroad...
From the outside, Visa contactless looks simple, but once the limit is exceeded and PIN comes into play it gets deeper. Why do response codes 65 and 70 behave so differently on POS devices in different countries, such as the Netherlands and Saudi Arabia?
Security
What Is OTP (One-Time Password)?
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.
Merchant & POS
Should I send a payment request I received at the customer's request as an e-commerce transaction?
A reader asks whether a payment request taken at a customer's request should be sent as an e-commerce transaction, and what really separates Mail Order from E-commerce authorization.
Agentic Commerce
Agentic Commerce Series – Part 5
Points or habit? Loyalty programs are built on steering human behavior. But if an AI agent starts shopping on our behalf, do points and campaigns still work the same way?
Payment Systems
Visa Overseas Contactless Transactions – After Code 70 (Part 2)
After switching to response code 70 for contactless limit-exceeded cases, we found that some overseas POS devices and acquirers did not handle it as expected. This post covers why the problem lies in the ecosystem and how to address it.
Merchant & POS
Offline PIN Counter = 0 Scenario: Who Is Liable for Transactions Approved Without a PIN?
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?
Fraud
What is Visa Merchant Purchase Inquiry (VMPI)?
Chargeback is the process of refunding a credit card payment when the goods or services that should have been received were not, or when transactions not made by the cardholder are identified. In Turkish it is translated as reversal of presentment.
Merchant & POS
What Is a Card Recovery Bulletin (Card Protection Bulletin)?
A Card Recovery Bulletin is a list of problem cards (lost, stolen, expired, over-limit, counterfeit or otherwise flagged) published by card schemes such as Visa or MasterCard. It shows whether a card number is listed on the date of purchase.
Chargeback
What Are the Domestic Exceptions to Chargeback Rules?
A chargeback is the refund of an amount paid by credit card to the cardholder's card when the purchased goods or services were not received, or when a transaction was not actually carried out by the cardholder.