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Diagram illustrating an Onus payment transaction between card and POS

Merchant & POS

What does Onus mean?

In the payment systems glossary, some terms are essential, including Onus. Onus literally means "on us" and refers to cases where the card-issuing bank and the POS/ATM bank are the same, meaning no clearing commission applies.

Close-up of a credit card, illustrating a transaction pending in open authorization

Merchant & POS

Can an Open-Authorization Transaction Be Cancelled?

Open authorization covers the period between authorization, POS batch close, the bank's end-of-day process, and clearing. Learn which steps allow cancellation versus refund, and what a cardholder should do.

Diagram illustrating how a bank allocates a credit card limit

Credit Card

What does credit card limit allocation mean?

A credit card is a card whose limit the bank sets after evaluating the customer against criteria such as income, payment history, and credit bureau score.

EMV Lower Consecutive Offline Limit 9F14 illustration

EMV

What Is the Lower Consecutive Offline Limit?

The Lower Consecutive Offline Limit is the maximum number of consecutive offline transactions allowed by the ICC application, as set by the issuer, on a terminal capable of going online. It is sent in tag 9F14.

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)?

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.

Diagram showing the flow of incoming and outgoing files in the clearing system between banks

Clearing

Clearing System Files: Incoming and Outgoing Files

The clearing system settles a transaction between two participants when a card from one bank is used at another bank's POS or ATM. Learn about the incoming and outgoing files used in interbank clearing.

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.

Credit card application eligibility illustration

Credit Card

Who Can Legally Get a Credit Card?

People over 18 who have the capacity to discern, are not under legal restriction and whose creditworthiness is deemed suitable by the bank can get a credit card. Banks set different criteria for professions, students and homemakers.

Visa Merchant Purchase Inquiry (VMPI) process diagram

Fraud

What is Visa Merchant Purchase Inquiry (VMPI)?

Chargeback is the process of refunding a credit card payment when the goods or services that should have been received were not, or when transactions not made by the cardholder are identified. In Turkish it is translated as reversal of presentment.