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"card issuing"

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Overview of card scheme organizations such as Troy, Visa and Mastercard

Laws & Regulations

What Is a Card Scheme Organization?

A card scheme organization establishes a debit, credit or prepaid card system and authorizes entities to issue cards or sign merchant agreements. Troy, Visa, Mastercard, American Express, JCB and MIR are examples. This post explains how ATM and POS certification works.

Contactless payment being made with a card at a POS terminal

Online & Authorization

When Does a Contactless Transaction Post to the Account?

A contactless transaction is a fast, secure payment made without direct contact between the card and the POS terminal (without reading the chip or magnetic stripe). Can every card be used for contactless payments? For a transaction to be contactless…

Diagram illustrating ISO 8583 field F23, the card sequence number

ISO 8583

ISO 8583 Field Descriptions (F23)

F23 - CARD SEQUENCE NUMBER: Information used to distinguish cards sharing the same card number. For example, the Card Sequence Number is incremented by 1 when a card is renewed. In an authorization transaction, if the F22 value is '05x'...

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.

Biometric credit card with a fingerprint sensor

Credit Card

What is a biometric credit card?

Technology continues to make our lives easier and more secure. Old ID cards were just laminated paper; new ones became personalized and secure with biometric photos added alongside chip data.

Close-up of the card security code printed on the back of a payment card

Credit Card

What is the Card Security Code?

The Card Security Code is a 3-digit numeric value used for cardholder verification and to reduce fraud risk. It is generated during card production and printed either on the card or encoded into the Track 1 and Track 2 data.

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.

Diagram illustrating the difference between Online PIN and Offline PIN verification in card payments

Payment Systems

What are Online and Offline PIN? Can PIN be bypassed?

Online PIN is verified by the card-issuing institution through the message itself, while Offline PIN is verified on the chip. This article explains the difference and when PIN bypass is allowed.

Diagram illustrating how netting works between two banks in the clearing system

Clearing

What Is Netting in the Clearing System?

In payment systems, a transaction made at a merchant or ATM with a card issued by a different bank becomes subject to clearing. Netting offsets each participant's receivables and payables from these transactions into a single balance.