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Diagram explaining how a pre-authorization transaction works on a credit card

Merchant & POS

What Is a Pre-Authorization Transaction?

An operation that allows a credit card's limit to be blocked for a period, due to the nature of the product or service sold. Preferred mainly by companies in travel, tourism, and car rental.

Illustration of ISO 8583 message field layout used for field F47

ISO 8583

ISO 8583 Field Descriptions (F47)

F47-ADDITIONAL DATA (NATIONAL) is the field reserved for domestic additional information. In Turkey, it carries the BKM Unique ID in authorization transactions and data specific to KKPT (card-to-card transfer) transactions.

Diagram showing the structure of the Card Verification Results (CVR) data element

Credit Card

CVR (Card Verification Results)

CVR (Card Verification Results) refers to the results of checks performed on the card. In short, it can be described as keeping the card's transaction log. BYTE 1 Bit 8-7: 00 = The second GENERATE AC command returned an AAC cryptogram (decline)...

Numberless bank card design concept with no printed digits

Credit Card

Did Someone Say a Numberless Card?

When we think of a credit card, we picture one printed with the Card Number, Cardholder Name, Expiration Date, and CVV2 information. But what if we told you there is a card with no numbers on it at all? It may sound strange at first, but...

Contactless card payment at a POS terminal with the transaction limit raised to 120 TL

Merchant & POS

Contactless Transaction Limit Raised to 120 TL

Per BKM data, 3 in 5 merchants accept contactless payments and 1 in 10 credit card transactions is contactless. From 1 August 2019, contactless payments by card or mobile device are allowed without a PIN up to 120 TL.

Illustration of a 3D Secure payment verification screen

Merchant & POS

What is a 3D Secure transaction?

In e-commerce transactions, the system developed to increase transaction security for payments made with credit and debit cards is called 3D Secure. When paying with 3D Secure, a special payment screen provided by the banks appears on the user's screen.

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.

Illustration of a payment card used for online shopping

Debit Card

Can You Shop Online with an ATM Card?

When we think of online shopping, we usually picture paying with a credit card. But can customers without a credit card, only an ATM card, shop online? Of course they can — you don't need a credit card to enjoy the convenience of e-commerce.

Illustration of a surcharge fee added to a card payment transaction

Merchant & POS

What is a surcharge?

A surcharge is a fee, charge, or tax added to the cost of a good or service. In payment systems, it refers to adding the merchant's transaction commission to the cash sale amount on credit card transactions, resulting in a higher charge.