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Diagram illustrating how a transaction's 3D Secure authentication level is determined

3D Secure

How is a transaction's 3D Secure level determined?

Especially with the growth of the internet, credit card transactions have started shifting from physical POS terminals to virtual POS terminals. In virtual transactions, the 3D Secure structure is used instead of the card PIN entered in physical transactions. So how is a transaction's…

Credit card and smartphone illustrating online card payments without physically presenting the card

Credit Card

Do I have to use my physical card when shopping?

In the early years of credit cards, using the card physically was mandatory. With the internet and new technologies, we can now pay with only the card details, 3D Secure and contactless NFC payments, even without the card in hand.

Illustration representing electronic payment systems

Payment Systems

What are Payment Systems?

Let's talk about payment systems, which we have heard more about since the internet entered our lives, and the basic structures behind them. The first credit card in the world was used in America in the 1920s.

Hand holding a credit card near an ATM screen used to check card debt

Credit Card

How Can I Check My Credit Card Debt?

In the past, banking transactions could only be carried out at branches, but with the advance of technology, customers can now complete their transactions through many channels without visiting a branch. Checking credit card debt is one of these.

Diagram illustrating the difference between Online PIN and Offline PIN verification in card payments

Payment Systems

What are Online and Offline PIN? Can PIN be bypassed?

Online PIN is verified by the card-issuing institution through the message itself, while Offline PIN is verified on the chip. This article explains the difference and when PIN bypass is allowed.

Example of a QR code (karekod) pattern

Merchant & POS

What is a static QR code?

A static QR code is a code whose content is fixed and can be used for multiple payment transactions. So what is the difference between a static and a dynamic QR code?

Credit card limit increase approval illustration

Credit Card

Can My Credit Card Limit Be Increased Without My Permission?

The limit set when the card was issued cannot be increased without the cardholder's permission and approval. If you have instructed periodic limit increases, later increases take effect unless you object within fifteen days of being notified.

Diagram of the Secure Mobile Payment and Electronic Document Management System under VUK 507

Payment Institutions & E-Money

What Is the VUK 507 Communique?

VUK 507 is the common name of Tax Procedure Law General Communique Serial No. 507, published in the Official Gazette on 1/6/2019 on the Secure Mobile Payment and Electronic Document Management System. It sets the rules for sales, collection and electronic document applications.

Diagram illustrating the Access Control Server (ACS) role in the 3-D Secure authentication protocol

Security

How can I find the list of Access Security Control (ACS) companies?

Access Security Control (ACS) is the security protocol that the card-issuing bank must maintain under the 3-D Secure protocol to support cardholder authentication. 3-D Secure is an XML-based protocol that adds an extra security layer to online card payments.

Illustration of remote identity verification and open banking in digital banking

Laws & Regulations

Remote Identity Verification, Reliance on Third Parties and Open Banking

Digitalization is changing how banks onboard customers. This post covers digital identity, verification methods, what the Turkish ID card offers, and Article 43 of the Regulation on Information Systems of Banks and Electronic Banking Services on remote identity verification and open banking.

Illustration explaining what a non-secure e-commerce card transaction is

Payment Systems

What is a Non-Secure transaction?

A non-secure transaction is an e-commerce transaction approved without any verification before authorization, such as SMS OTP. In short, authorization is obtained by verifying only the card number, expiration date, and CVV2.

Illustration explaining the concept of the first online transaction after a card PIN change

Merchant & POS

What Does First Online Transaction Mean?

In payment systems, an online transaction means the transaction is sent to the card or POS/ATM bank at the moment it occurs, and required checks are obtained from that system. So does every transaction happen online? Of course not. Especially with contactless...