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Debit Card
The use of prepaid cards, and the number of prepaid cards issued by e-money institutions, has risen sharply. This post looks at why, how to choose a card, and which fees prepaid cards charge.
Merchant & POS
Magnetic Secure Transmission (MST) is a mobile payment technology in which devices such as smartphones emit a signal that mimics the magnetic stripe on a traditional payment card, letting a physical card's POS use be imitated without upgrading terminal software or hardware.
Online & Authorization
In EMV, data is stored in Tag-Length-Value (TLV) format, and it is carried between the card, the POS terminal, and the authorization system in this same format. This post lists every EMV Tag, its type, and its description.
Merchant & POS
In chip transactions made with a credit card via POS, the transaction amount is approved by the card and POS based on parameters on the card and POS, without going to the card bank or POS bank. These are called offline transactions.
Credit Card
An installment transaction splits a payment into a set number of installments reflected on the cardholder's statement, when the card and POS bank are the same. For example, a 1000 TL transaction in 5 installments reflects 200 TL per statement period, starting from the first one.
Merchant & POS
Mail Order (Mail Order/Telephone Order) is a transaction made by selecting the Mail Order option on a POS or through the virtual POS interface, entering the card number, expiration date, and CVV2. It is typically used when the cardholder is not present.
Credit Card
Due to how payment systems work, authorization is obtained for a transaction first. For a Not Onus transaction (different card and POS banks), the system waits for it to arrive via the clearing incoming file. If it does not arrive within about a week, the transaction expires.
Chargeback
Chargeback reason codes vary by card scheme. The Amex chargeback reason codes and their descriptions are listed below: American Express Chargeback Reason Codes A01 The charge you submitted did not receive a valid authorization approval code for the amount...
Online & Authorization
A reference guide to authorization response codes seen on POS and ATM transactions, with plain-language explanations of what each code means and what to do about it.
Payment Systems
TCR stands for Transaction Record Component, the packets that carry transaction information in a clearing system. Transaction types in a clearing file are distinguished by transaction code and usage code values, and this data is sent inside TCR packets.
Merchant & POS
An offline transaction is one approved by the card and the POS themselves, without going to any system (the card's bank or the POS's bank), when a chip card transaction is made at a POS. For this reason, some sectors considered risky are restricted.
Merchant & POS
In the first post I explained what closed-loop payment systems are and how they differ from open-loop ones. Many of the replies I received boiled down to one question: how do these systems actually work behind the scenes once a QR code is scanned?