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Illustration showing how the Luhn algorithm calculates and validates a credit card check digit

Credit Card

How is a credit card number generated? (Luhn Algorithm)

The Luhn algorithm was developed by Hans Peter Luhn and IBM in 1954. It is also known as the Luhn Check or Mod Check. It is used in two ways: preparing a given number according to the Luhn algorithm, and validating a given number using the Luhn algorithm.

Photo illustrating the use of a prepaid card

Credit Card

Is a Prepaid Card a Credit Card or a Debit Card?

A prepaid card may look like a debit card since it has no predetermined limit and purchases are limited to the amount loaded by the cardholder, but in terms of use and operating logic it differs significantly from both credit and debit cards.

Physical credit card compared with a virtual card on a mobile phone

Credit Card

Physical or Virtual Credit Card: Which Do You Prefer?

Digitalization is reshaping payment systems. Credit cards are moving from physical plastic to virtual cards, e-wallets and mobile payments. Will physical card use disappear completely? Here is a look at the trends, Generation Z and the remaining gaps.

Illustration of a credit card showing standard ISO/IEC 7810 and 7811 design features

Credit Card

What is a Credit Card?

A credit card is a printed card, or a card number with no physical form, that allows the purchase of goods and services or cash withdrawal without using cash. So how are credit card limits set and managed? Setting a limit involves checking many parameters about the customer.

Photo of a prepaid card used for everyday purchases

Credit Card

What should you know before buying a prepaid card?

A prepaid card is a customized chip or chipless card that is not linked to a bank account and has no credit limit like a credit card. You can only spend up to the amount loaded onto the card.

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.

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Merchant & POS

BKM Releases Data for the First 6 Months of 2020

BKM publishes card usage data every three months. In the first half of 2020, card payments reached TL 500 billion, contactless payments tripled, and online card payments surged in the electronics and clothing sectors.

Credit card minimum payment ratio change announced by the BRSA

Credit Card

Change Made to the Credit Card Minimum Payment Ratio

The credit card minimum payment amount lets customers who cannot pay their full debt keep using their cards. In June 2019 the BRSA set the minimum payment at 30 percent for all limits, and kept 40 percent for cards issued within the past year.

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.

Infographic of BKM 2020 card payment statistics in Turkey

Payment Systems

BKM Announces 2020 Card Payment Data

BKM shares card payment data periodically. In 2020, the pandemic reshaped payment habits in Turkey: contactless and online payments surged and the total card payment amount grew 17 percent to TRY 1.15 trillion, with about 264 million cards in circulation.