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Diagram illustrating TCR (Transaction Record Component) packets used in payment clearing and settlement files

Payment Systems

What Is TCR (Transaction Record Component)?

TCR stands for Transaction Record Component, the packets that carry transaction information in a clearing system. Transaction types in a clearing file are distinguished by transaction code and usage code values, and this data is sent inside TCR packets.

Workflow diagram of bank and courier file integration for card distribution

Courier & Delivery

How Is Bank Integration Done for Card Distribution via Courier?

Courier companies and banks generally carry out the card distribution process through file exchanges. (Some banks also use web service integration; in that case the information normally sent via file is transmitted within the service.) With the courier...

Example of a QR code

Merchant & POS

What is QR (Quick Response) Code?

QR Code is a two-dimensional barcode system developed by Denso Wave, a Toyota subsidiary operating in Japan. Its name comes from the initials of Quick Response. Its content can be any data, including text, a website address, or a video link.

Exterior of the Takasbank headquarters building

Payment Systems

What is Takasbank?

Takasbank (Istanbul Settlement and Custody Bank) exists to increase the competitiveness of Turkey's markets by providing clearing and custody services, financial services, and other economic activities under the relevant legislation.

Table showing service code values and their meanings for payment cards

Credit Card

What is the Service Code on Cards?

The service code is information printed on a card's Track 1 and Track 2 data, covering card type, PIN usage, and domestic/international usage status. It is kept at the product level in bank systems.

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 illustrating the soft chargeback retrieval request process between cardholder, issuer and merchant

Chargeback

What Is a Soft Chargeback?

A soft chargeback, also called a retrieval request, is a request for documents about a transaction the cardholder does not recognize. Learn why customers request them, what information merchants should provide, and why a fast response matters.

Photo of a POS terminal related to EMV Issuer Action Code settings

Online & Authorization

Issuer Action Code (IAC)

These are codes that communicate the issuer's conditions for approving a transaction online (IAC-Online), for declining it (IAC-Denial), or for declining it when the terminal cannot go online (IAC-Default).