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Roll of thermal paper used in POS terminals

Merchant & POS

What Features Should POS Paper Rolls Have?

POS paper rolls, which seem like the simplest part of a POS terminal, must still meet certain conditions. Most of us only look at the amount on the front of the receipt, never the back.

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.

Illustration of withdrawing cash from an ATM using a QR code generated in a mobile banking app

ATM

Withdrawing Cash with a QR Code

With the advancement of technology, cash withdrawal methods have also diversified. The latest trend is withdrawing cash with a QR code. By generating a QR code through the mobile branch app of a bank that supports this feature, customers can withdraw cash from an ATM without a card.

Illustration representing credit card fraud and online payment security risks

Fraud

What is Fraud? What are the Types of Fraud?

With the growth of credit and debit card usage and rising e-commerce transaction volumes, there has been a serious increase in exploiting user negligence to harm customers. Fraud means using someone else's card at a merchant or ATM to gain unjust profit.

Diagram illustrating the Track 1 data structure and field layout on a magnetic stripe card

Credit Card

What is Track 1?

Track 1 is a special data set encoded on a card's magnetic stripe that contains the card information required for authorization when the card is used physically. It includes the cardholder name, card number, and expiration date.

Illustration of the benefits credit cards provide to merchants

Credit Card

What benefits do credit cards provide to merchants?

At first glance, a credit card seems like a product offered for cardholders' use and benefit, but it also provides significant benefits to merchants, from faster cash flow to collection security and new customers.

Diagram showing the pre-authorization closing process flow on a POS terminal

Merchant & POS

What Is Pre-Authorization Closing?

Pre-authorization closing turns a pre-authorized transaction into a financial one, posting it to the merchant and cardholder accounts. See how amounts and available limit are affected.

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.

Diagram illustrating ISO 8583 Field 12 local transaction time

ISO 8583

ISO 8583 Field Descriptions (F12)

DE 12-TIME, LOCAL TRANSACTION: the local time at which the transaction took place at the point of transaction (ATM, POS). 6 digits, hhmmss format. F12 differs from F7 (Transmission Date and Time).

Diagram explaining ISO 8583 field 11 (STAN)

ISO 8583

ISO 8583 Field Descriptions (F11)

DE 11 - SYSTEMS TRACE AUDIT NUMBER: A 6-digit unique numeric value generated by the message originator, enabling unique tracking of the transaction. How is STAN generated?

Diagram of ISO 8583 Field 2 (F2) card number structure

ISO 8583

ISO 8583 Field Descriptions (F2)

F2 is the Card Number field in ISO 8583, identifying the cardholder and issuing bank. This post covers its structure, the 8-digit BIN update, field format, first-digit scheme identification, and PCI DSS security requirements.