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.
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ISO 8583
ISO 8583 Field Descriptions (F95)
DE 95, Replacement Amounts, shows the transaction amount information in full or partial reversals. Here are its subfields and how it relates to F4.
ISO 8583
ISO 8583 Field Descriptions (F38)
DE 38 (AUTHORIZATION IDENTIFICATION RESPONSE) is the authorization code generated when a transaction is approved. It is alphanumeric, 6 characters long, and left empty for declined transactions.
Merchant & POS
Can Transactions Made Through a POS Be Posted Twice to the Merchant Account?
It doesn't happen often, but it can occur. This usually happens when the batch (end of day) process isn't run every day and is instead triggered from the bank's system, causing POS transactions to be posted to the merchant account twice.
Merchant & POS
What's the Difference Between a Reversal and a Cancellation (Void)?
What's the difference between a reversal and a cancellation (void)? Both zero out a transaction's financial effect, but they're triggered in very different ways.
Merchant & POS
What is ISO 8583?
Introduction: When a card (credit card/debit card/prepaid card) is used at an ATM or POS, data must be carried securely between systems. For example, in a store sale, the POS initiates the transaction, which must reach the cardholder's bank intact.
Clearing
What Are Clearing and Settlement?
Clearing: the transmission of transfer orders sent to the system, mediating their mutual delivery, obtaining authorization prior to settlement in some systems, and netting payment orders.
Payment Systems
What are Payment Systems?
Let's talk about payment systems, which we have heard more about since the internet entered our lives, and the basic structures behind them. The first credit card in the world was used in America in the 1920s.
Merchant & POS
Terms that should be in your payment systems glossary
Below are the definitions of the cornerstone terms of payment systems, as established by the Banks Association of Turkey (TBB): debit card, credit card, merchant, cardholder, and more.
Online & Authorization
Response Codes That Can Be Received in Offline Transactions
Below are the possible response code values for offline transactions and their explanations: Response Code / Explanation - Y1: Approved offline, Z1: Declined offline, Y2: Approved after referral, and more.
Merchant & POS
Can a Contactless Offline Transaction Occur?
A contactless offline transaction can occur. If the amount is lower than the floor limit defined on the POS and the card also allows offline authorization, the transaction can be completed offline. Offline transactions are periodically sent by the POS to the acquiring bank.
Credit Card
What is Stand-In Authorization?
In the standard authorization flow, the transaction is initiated by the acquirer (POS bank) and forwarded to the issuer (card-issuing institution). The process is completed once the issuer responds. However, this isn't always possible; when the issuer fails to respond, BKM steps in...