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"merchant bank"

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Screenshot of an Address Verification Service (AVS) response code table

Merchant & POS

What is Address Verification Service (AVS)?

Address Verification Service (AVS) is a fraud prevention system that helps limit fraud and chargebacks when used effectively. It verifies that the address a customer enters matches the cardholder's address on file with the issuer.

Diagram showing the role of the Access Control Server (ACS) in the 3-D Secure authentication flow

Security

What is Access Security Control (ACS)?

Access Security Control (ACS) is the security protocol that the card-issuing bank must maintain in 3-D Secure to support cardholder authentication, functioning as a complete authentication solution for issuers and payment processors.

Chart of the effects of credit card usage on inflation

Credit Card

Does Credit Card Usage Increase Inflation?

The effect of credit cards on inflation has been debated for years. Because I am asked about it so often, I ran a poll on arifunal.com to gather readers' views. This post weighs the positive and negative effects and compares the poll with the research findings.

Issuer data and BIN definitions on POS terminals

Merchant & POS

Why Are Issuer Data Definitions Important?

The most important part of issuer data definitions is that they are built around your own bank's or institution's developments and application flows. Missing BINs can break installments, rewards and routing on POS devices.

Illustration showing the difference between a cancellation and a refund transaction

Merchant & POS

What Is a Cancellation (Void) and a Refund?

Credit card transactions made via POS sometimes need to be reversed. These are called a cancellation (void) or a refund. What's the difference, and when does each apply?

Overview of Türkiye's Law No. 6493

Laws & Regulations

What Is Law No. 6493? What Does It Contain?

Law No. 6493, published in Official Gazette No. 28690 on 27 June 2013, regulates the procedures and principles for payment and securities settlement systems, payment services, payment institutions and e-money institutions.

Merchant onboarding process illustration

Merchant & POS

What is Onboarding (Merchant Definition)?

Onboarding refers to all the practices that help a customer learn to use a product or service for the first time. In payment institutions, it covers verifying a customer's information and documents during merchant application.

Diagram illustrating card fraud and forgery in card payments

Security

What Is Forgery in Card Payments?

Forgery in card payments means transactions made with card details without the cardholder's knowledge, or purchases with counterfeit or stolen cards. Merchants cannot eliminate fraud and chargeback risk, but they should aim to reduce it to reasonable levels.

Illustration explaining OTP one-time password verification

Security

What Is OTP (One-Time Password)?

These are passwords generated for one-time use and sent to the cardholder's phone to verify card transactions in payment systems. The password sent during a 3D Secure transaction is a common example.