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Istanbulkart transit and payment card

Credit Card

Istanbulkart: Both Transit Card and Payment Card

When I think back to the Akbil I used when I first arrived in Istanbul, I think it's fair to say that Istanbulkart has undergone a very significant transformation. Users can now track activity, top up and view balances right from their phones.

Diagram illustrating the NextGenPSD2 framework for open banking APIs

Open Banking

What Is NextGenPSD2?

NextGenPSD2 is the set of API standards launched by the Berlin Group in 2017, now involving more than 1,700 banks from 20 countries. This post explains what the framework offers to banks, fintechs and third-party providers under PSD2.

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.

Diagram of a first credential-on-file transaction using stored card data

Security

What is the First Credential-On-File transaction?

The first transaction made after a customer's card data is stored with a merchant is called the First Credential-On-File transaction. BKM expects it to be flagged with the value "C" in switch message field DE48.PDS86, and BRSA draft rules govern how card data may be stored.

Illustration of recurring payments and automatic card collection for subscription businesses

Merchant & POS

Key Points to Watch for in Recurring Payments

Winning customers is one of the most important things in business, but keeping them satisfied matters just as much. If you collect payments at regular intervals, such as monthly, these tips will help you improve the success rate of recurring collections.

BKM (Interbank Card Center) membership acceptance criteria overview

Laws & Regulations

What Are the BKM Membership Acceptance Criteria?

BKM (Interbank Card Center) membership is available in 3 statuses: bank, institution or HSK. This post explains the eligibility criteria for each status, the 12-month certification requirement and the BKM fee principles.

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 of ISO 8583 Field 3 Processing Code structure

ISO 8583

ISO 8583 Field Descriptions (F3)

Field 3, Processing Code, is the field that shows what type of transaction is being performed and is critical for authorization. A Sale from POS differs from a Cash Withdrawal at an ATM.

Diagram of basic payment systems terminology including issuer, acquirer, and authorization

Payment Systems

Basic Terms Used in Payment Systems

Although many important terms are used in payment systems, the expressions below are its cornerstones — the ABCs of payment systems, so to speak. Issuer: the credit card company, usually a bank, that issues the card and tracks debt, credit, bonus points, and other services for the customer.