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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.

Credit card being presented at a POS terminal for a pre-authorization transaction

Merchant & POS

Is a Card Required for a Pre-Authorization Transaction?

Whether a card is required for a pre-authorization transaction depends on the type of POS used. On a physical POS, the card must be swiped or inserted to start the transaction. On a virtual POS, entering the card details manually is enough.

Diagram showing how offline transactions are relayed from the POS to the card bank

Merchant & POS

How Do Offline Transactions Reach the Card and POS Bank?

In chip transactions made with a credit card via POS, the transaction amount is approved by the card and POS based on parameters on the card and POS, without going to the card bank or POS bank. These are called offline transactions.

Diagram showing how pre-authorization blocks a card's available limit

Credit Card

Which Cards Can Be Used for Pre-Authorization?

Pre-authorization reduces the merchant's risk by blocking part of the card's limit for a set period. Since a credit card has a defined limit, an amount can be blocked against it. ATM cards and prepaid debit cards have no such limit to block.

POS payment terminal illustration

Credit Card

What is Dual Messaging?

When the card-issuing bank and the POS bank are different, first obtaining authorization and then running the clearing process to finalize the transaction is called Dual Messaging. So why is a dual message structure needed?

Illustration representing an installment transaction made with a credit card

Credit Card

What is an Installment Transaction?

An installment transaction splits a payment into a set number of installments reflected on the cardholder's statement, when the card and POS bank are the same. For example, a 1000 TL transaction in 5 installments reflects 200 TL per statement period, starting from the first one.

Buy Now, Pay Later (BNPL) concept illustration

Payment Systems

What is BNPL (Buy Now, Pay Later)?

The term 'Buy Now, Pay Later' (BNPL) refers to deferring payment on a purchase to a later date. The product is delivered to the customer before any payment is made, and the customer pays afterward.

Illustration representing the advantages and disadvantages of credit cards

Credit Card

What Are the Advantages and Disadvantages of a Credit Card?

Credit cards can be a convenient way to manage income and expenses, but for those who don't know how to use them, they can become an expensive and risky product. Here are the key pros and cons to weigh before applying for one.

Illustration of a money transfer being sent from one payment card to another

Credit Card

What Is a Card-to-Card Money Transfer?

Card-to-Card Money Transfer (CCMT) lets customers send money 24/7 from a credit, debit, or prepaid card to another card via ATM, internet banking, call center, or mobile app.

Table of credit card authorization response codes

Credit Card

What are Credit Card Status Codes in Authorization?

Cases where authorization approval is declined have always puzzled cardholders. Whenever the response code requires contacting the issuing bank (usually for declined transactions), the date, amount, and response code of the failed transaction become very important.

Illustration representing the products and services KKB offers directly to its member institutions

Credit Card

What Products and Services Does KKB Offer Directly to Members?

KKB was established, under banking law, to enable the exchange of all kinds of information and documents among at least five banks, and it also shares credit information about customers. The Credit Bureau of Turkey also serves deposit banks, participation banks, financial institutions, and more.