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Illustration showing how an Application Identifier (AID) is used in a chip card transaction

EMV

What is an Application Identifier (AID)?

The AID tells the terminal which applications are present on a chip during a POS or ATM transaction. What does the AID do? It lets the terminal determine whether it supports an application on the chip. In Tag 9F06, it is 5-16 digits long.

Illustration representing Merchant Category Code classification for card transactions

Merchant & POS

What Does a Restricted/Prohibited MCC Mean?

The MCC code, or Merchant Category Code, is a 4-digit code used to classify merchants. Some MCC codes are restricted or prohibited, and POS terminals or card transactions may be blocked when such a code is used.

Banking Regulation and Supervision Agency (BRSA) building and emblem

Payment Institutions & E-Money

What Is the BRSA?

The BRSA is the Banking Regulation and Supervision Agency, an autonomous agency that protects savers' rights, ensures banks operate soundly and securely, and contributes to the long-term growth and stability of Turkey's economy.

Account Information Service Provider concept icon

Payment Systems

What are Account Information Service Providers?

Digital Account Checking underpins many innovative banking and FinTech services. In most cases, it is performed by Account Information Service Providers, which supply data from customers' online bank accounts to other banks and third-party providers.

Diagram illustrating the PSD (Payment Services Directive) regulatory framework

Merchant & POS

What is PSD (Payment Services Directive)?

PSD stands for Payment Services Directive, known as the Payment Services Law. It took effect in EU countries in 2009, and in 2015 new revisions were announced as PSD1, aiming to build an efficient, fast, secure, and competitive payment market.

Diagram illustrating the ISO 20022 financial messaging standard

Payment Systems

What Is ISO 20022?

There are standards that keep payment systems running smoothly and reliably. One of these is ISO 20022. So what is ISO 20022, and why was it created? It is an international, XML-based financial messaging standard developed in 2009.

Illustration of ISO 18245 merchant category codes (MCC)

Payment Systems

What Is ISO 18245?

ISO 18245 is an ISO standard on the management of Merchant Category Codes (MCC) in retail financial services. ISO 18245: 2003 defines the code values used to classify merchants by the type of business, trade or service they provide.

Diagram illustrating how an API connects applications and servers

Payment Institutions & E-Money

What is an API?

Used as an abbreviation for Application Programming Interface, an API is an interface that allows an application's functions to be accessed and used from outside or remotely, letting an application on a server be reached from different platforms.