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Logos of various international payment card schemes

Credit Card

What Are National and International Payment Schemes?

In the world of payment systems, just as credit cards are an indispensable product, a payment scheme is indispensable for credit cards. When a credit card product is launched, the scheme it will be issued under is decided first.

Credit card expiration date printed on the front of a card

Credit Card

What Is Effective Date?

The Effective Date is the information showing the date until which a card can be actively used. It can also be called the expiration date. It is a mandatory field printed on the card and used in transactions, set by banks for card security.

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.

Illustration explaining the authorization process for card payments at POS, virtual POS, and ATM terminals

Merchant & POS

What is Authorization?

The term 'provizyon' comes from French and means obtaining approval for a transaction. In payment systems, authorization confirms that the card, POS, bank account, and transaction limits are sufficient to complete a payment.

Illustration representing the DCI debit credit indicator distinguishing card types in a transaction

Credit Card

What Is DCI (Debit/Credit Indicator)?

DCI (Debit/Credit Indicator) is a flag that shows whether a transaction was made with a credit card or a debit card. With the arrival of prepaid cards, it began to be used as DCPI (Debit/Credit/Prepaid Indicator). Is DCI sent in the authorization message?

Close-up of a payment card showing its first six digits, the BIN

Credit Card

What Is a BIN (Bank Identification Number)?

BIN stands for Bank Identification Number, the unique code made up of a card's first 6 digits that identifies which bank issued it, under the ISO/IEC 7812 standard.

Apple Card and Apple Pay announcement graphic from Apple's Special Event

Credit Card

Apple Is Rewriting the Card World...

Most of us remember the impact the first iPhone, introduced by Steve Jobs on January 9, 2007 and revolutionary for its time, had on our lives. In a similar way, a product that will completely change how we use and view credit cards...

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.

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.

Calendar illustrating a credit card statement closing date

Credit Card

What is the Statement Closing Date?

Credit cards have replaced cash in daily life. Although preferred for installments and reward points, they offer many benefits when used correctly, but uncontrolled spending and late payments can cause serious problems.

Contactless payment being made with a chip debit card at a POS terminal

Debit Card

Can a debit card (ATM card) be used for contactless transactions?

A contactless transaction is a fast, secure payment made between a chip card and a POS device without direct contact, without the card's chip or magnetic data being read through the card reader. Can this be done with a debit card (ATM card)?

Infographic of 2018 card payment statistics in Turkey published by BKM

Merchant & POS

2018 Payment Systems Scorecard

BKM (Interbank Card Center) shared 2018 developments in card payments and the cashless society goal in Turkey. The data shows card payments becoming a bigger part of daily life every year.