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PIN pad screen on a payment terminal for entering a card PIN

Credit Card

What Happens If I Enter the Wrong PIN on Card Transactions?

Nearly all transactions where credit and debit cards are used physically require a PIN. The PIN represents the cardholder's identity. Here is what happens if a customer enters the wrong PIN too many times and how the card is restored.

Diagram illustrating clearing types between card-issuing and POS banks

Clearing

What are the Clearing Types?

In card transactions via POS/ATM, when the card-issuing bank differs from the POS/ATM bank (Not Onus), the transaction is subject to clearing. Below, POS can also mean ATM. Is the clearing system a single type? No...

Card skimming and copied card details

Credit Card

What Should I Do If My Card Details Are Copied?

Card copying usually happens with magnetic stripe debit cards. As soon as you notice your card details have been copied, you can close the card, renew it or change its PIN.

Diagram illustrating the stages a credit card goes through from application to delivery

Credit Card

What stages does a credit card go through before reaching the customer?

Credit cards are undoubtedly the most important payment tool for most of us when shopping. So what stages does a credit card or debit card go through before it reaches our pocket? The customer submits a card application request, and the process continues from there.

Illustration of the compliance process between merchant bank and issuer in card payments

Chargeback

What Is Compliance (Regulatory Compliance)?

Compliance means adherence to card scheme rules. Outside chargebacks, it is how a bank that loses money because card payment organization rules were broken recovers that amount from the party that caused the loss.

Photograph of a POS terminal used for Chip and Pin card payments

Merchant & POS

What is Chip&Pin?

Chip&Pin, introduced in Turkey on March 31, 2006, is a payment method that greatly reduces the risks of card copying and loss or theft fraud. The chip on the card reduces copying risk, while the 4-digit PIN prevents unauthorized use of a lost card.

PIN pad device connected to a POS terminal

Merchant & POS

What Is a PIN Pad Device?

A PIN pad lets cardholders safely enter their PIN during POS transactions and lets contactless cards be tapped to transfer card data to the POS. Here is how it works.

Illustration of embedded finance, with payment, credit, insurance and investment services built into everyday digital platforms

Open Banking

What Is Embedded Finance?

Embedded Finance means integrating financial products and services into non-financial platforms, experiences or business processes. In other words, services offered by financial institutions become part of the product or service flows of non-financial organizations.

Diagram illustrating a bank's OnUs transaction flow and the process of opening ATMs to other banks' cards

ATM

What needs to be done to open ATMs to the use of all bank cards?

Suppose you are a newly established bank, wanting to offer customers all your products and services. Of course, this is not easy. First, the Bank's OnUs transaction processing step must run successfully before other banks' cards can be accepted at the ATMs.

Diagram illustrating EMV Level 1, Level 2, and Level 3 certification stages for payment terminals

Merchant & POS

What Are EMV Level 1, Level 2, and Level 3 Certifications?

The EMV Level 1 standard refers to an important global payment industry specification defining the electrical and physical interface between credit and debit cards and the payment terminal (ATM/POS). The EMV Contactless Level 1 certification guarantees that the device…

Table of Visa and Mastercard fraud codes and descriptions

Security

What Are the Visa and Mastercard Fraud Codes?

Fraud means obtaining unjust gain by carrying out a transaction at a merchant or ATM using someone else's credit card or debit card, causing a loss to the real cardholder, the merchant, or the bank. So what fraud codes do Visa and Mastercard use?

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.