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Diagram illustrating the Easy Addressing System (KOLAS) within Turkey's FAST payment network

FAST

What is the Easy Addressing System (KOLAS)?

The Easy Addressing System (KOLAS) is one of the layered services of FAST, the Central Bank's instant funds transfer system, developed and operated by BKM. It lets users send money via phone number or email instead of an IBAN.

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.

Illustration showing a margin added to a foreign currency exchange rate

Merchant & POS

What Is a Marked-Up Exchange Rate?

In payment systems, exchange rate information is used in two places: POS devices that support foreign currency transactions, and credit card transactions made in a foreign currency (usually abroad).

Diagram illustrating ISO 8583 Field 12 local transaction time

ISO 8583

ISO 8583 Field Descriptions (F12)

DE 12-TIME, LOCAL TRANSACTION: the local time at which the transaction took place at the point of transaction (ATM, POS). 6 digits, hhmmss format. F12 differs from F7 (Transmission Date and Time).

Diagram of the committees within the BKM system

Payment System Institutions

What are the committees in the BKM system?

BKM (Interbank Card Center) works through several committees: Security, Operations and Technology, Market Development, Business Development, Chargeback Rules and Arbitration, ATM Sharing, plus arbitration committees. This post outlines each one's duties.

Payment by SMS link on a mobile phone illustration

E-commerce

What Is Payment by SMS?

Payment by SMS is a solution where the merchant sends the customer a link via SMS through an online collection system, and the customer pays by entering their debit or credit card details.

Illustration of a digital wallet storing payment card information

Credit Card

What Is a Wallet?

The term 'wallet' has many definitions in payments and fintech. In general, it refers to digital wallets (e-wallets) used in e-commerce, popular because they let users securely store payment information and pay easily.

Announcement graphic showing the FAST money transfer limit raised to TRY 20,000

Payment Systems

FAST money transfer limit raised to TRY 20,000

The limit for FAST transactions, which enable interbank 24/7 instant money transfers, was raised to TRY 20,000 as of 14.02.2023. This post covers the change and its impact; the figure is historical and the limit has since been raised again.

POS terminal used for processing card payments at a merchant

Merchant & POS

How Does a POS Device Communicate with the POS Bank?

A POS is a functional device with its own dedicated software, customized to the authorization system of the bank it is connected to, that accepts credit or debit cards. The POS and the authorization system communicate using the ISO 8583 standard.