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Illustration representing an installment mail order card transaction

Merchant & POS

Is an installment Mail Order transaction possible?

A reader asked whether installment mail order transactions are still possible, and whether a card limit equal only to the installment amount is enough. This article shares the answer.

Cover of the Visa Merchant Data Standards Manual document

Merchant & POS

What Is the “Merchant Data Standards Manual”? How Can I Access It?

Visa's Merchant Data Standards Manual covers classification, identification and data standard requirements for merchants, payment facilitators and marketplaces, including merchant naming, location and MCC rules. Here is what it contains and where to find it.

Diagram illustrating EMV Level 1, Level 2, and Level 3 certification stages for payment terminals

Merchant & POS

What Are EMV Level 1, Level 2, and Level 3 Certifications?

The EMV Level 1 standard refers to an important global payment industry specification defining the electrical and physical interface between credit and debit cards and the payment terminal (ATM/POS). The EMV Contactless Level 1 certification guarantees that the device…

Illustration of the benefits credit cards provide to cardholders

Credit Card

What benefits do credit cards provide to cardholders?

Many people who appear as credit card victims in the news and on social media run into trouble because they think their credit limit is unlimited and forget it must eventually be repaid. A credit card is the best payment instrument, if you know how to use it.

Diagram showing the structure of an EMV AID value split into RID and PIX sections

EMV

What is the Registered Application Provider Identifier (RID)?

RID is part of the AID value, which is structured according to ISO/IEC 7816-5 and consists of two sections: a value specific to the application provider, and an optional field used to identify different providers or products.

Illustration representing QR code payment routing in Turkey

Payment Systems

What are the QR Code Routing System (KYS) Rules?

The purpose of these rules is to set out the operating rules, participation requirements, and pricing principles of the QR Code Routing System (KYS) established and operated by BKM, as well as other procedures related to KYS's operation.

Stand-in authorization flow diagram

Credit Card

What is Stand-In Authorization?

In the standard authorization flow, the transaction is initiated by the acquirer (POS bank) and forwarded to the issuer (card-issuing institution). The process is completed once the issuer responds. However, this isn't always possible; when the issuer fails to respond, BKM steps in...

Diagram explaining the System Trace Audit Number (STAN) field in a payment transaction

Merchant & POS

What is a System Trace Audit Number (STAN)?

The System Trace Audit Number (STAN) is a number assigned by the third-party system (ATM or POS) to help uniquely identify a transaction. It is generated in the range 000001 to 999999. Each new authorization message needs a new STAN; retries reuse the original STAN.

Contactless card payment on a POS terminal abroad

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?