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Diagram illustrating the retrieval request process in card transactions

Chargeback

What is a Retrieval Request?

A chargeback is when cardholders dispute a transaction made without their knowledge through their card-issuing bank. So what does a Retrieval Request mean? It is essentially a document request related to transactions a cardholder does not recognize on their statement.

Diagram showing how offline transactions are relayed from the POS to the card bank

Merchant & POS

How Do Offline Transactions Reach the Card and POS Bank?

In chip transactions made with a credit card via POS, the transaction amount is approved by the card and POS based on parameters on the card and POS, without going to the card bank or POS bank. These are called offline transactions.

Table of credit card authorization response codes

Credit Card

What are Credit Card Status Codes in Authorization?

Cases where authorization approval is declined have always puzzled cardholders. Whenever the response code requires contacting the issuing bank (usually for declined transactions), the date, amount, and response code of the failed transaction become very important.

Diagram showing the Issuer Domain, Interoperability Domain and Acquirer Domain in 3D Secure

Merchant & POS

What are Payment Scheme 3D Secure systems?

3D Secure is short for Three Domain Secure (Issuer Domain, the Interoperability Domain and the Acquirer Domain), used to increase security in online transactions. Known to cardholders as 3D Secure, these systems are given unique names by payment schemes (MasterCard, Visa, etc.).

Diagram showing different types of POS terminals used for card payments

Merchant & POS

What Is a POS (Point of Sale)?

Virtual or electronic authorization devices connected to a bank, used by merchants to accept card payments. The term comes from the English phrase Point of Sale. Covers POS types by communication method, their advantages, who can use one, and the transactions a POS can perform.

Diagram showing how card transaction data flows through the ISO 8583 messaging standard

Merchant & POS

What is ISO 8583?

Introduction: When a card (credit card/debit card/prepaid card) is used at an ATM or POS, data must be carried securely between systems. For example, in a store sale, the POS initiates the transaction, which must reach the cardholder's bank intact.

Diagram explaining ISO 8583 message types 200 and 210

Payment Systems

What Are 200 and 210 Messages Used For?

Message 200 is generated for transactions initiated from POS applications, and the acquiring bank responds with message 210. Learn how 100/110 messages route approvals via the issuing bank, and common rejection reasons.