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Diagram illustrating ISO 8583 Field 61 Point of Service (POS) data structure

ISO 8583

ISO 8583 Field Descriptions (F61)

F61 - POINT OF SERVICE (POS) DATA: This field provides information about the specific status of the POS at the time of the transaction. Position Usage Attribute 1 POS Terminal Attendance Indicator 0 = Attended terminal (Valid for MasterCard debit card and Maestro transactions only).

Diagram showing the CAT (Cardholder Activated Terminal) Indicator field used in payment authorization messages

Merchant & POS

What is the CAT (Cardholder Activated Terminal) Indicator?

CAT (Cardholder Activated Terminal) devices are typically unattended terminals that accept various payment cards. These terminals are frequently installed at railway ticket stations, gas stations, toll roads, parking lots, and other commercial locations.

Credit card statement showing an unrecognized transaction

Credit Card

Is Your Card Making Purchases Without Your Knowledge?

While reviewing your credit card statement, you suddenly notice a transaction you never made. What would you think? Is your card going shopping while you sleep? Let's look at how this can happen and what to do about it.

Diagram showing how an open authorization moves to a card statement after batch close and clearing

Credit Card

What Is an Open Authorization?

In credit card transactions made through a POS, receiving approval alone is not enough for the transaction to post to the card's statement period; settlement must also take place. The settlement period, known as the open-authorization waiting time, varies by transaction type.

Illustration of recurring payments and automatic card collection for subscription businesses

Merchant & POS

Key Points to Watch for in Recurring Payments

Winning customers is one of the most important things in business, but keeping them satisfied matters just as much. If you collect payments at regular intervals, such as monthly, these tips will help you improve the success rate of recurring collections.

Illustration showing how an Application Identifier (AID) is used in a chip card transaction

EMV

What is an Application Identifier (AID)?

The AID tells the terminal which applications are present on a chip during a POS or ATM transaction. What does the AID do? It lets the terminal determine whether it supports an application on the chip. In Tag 9F06, it is 5-16 digits long.

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.

POS payment terminal illustration

Credit Card

What is Dual Messaging?

When the card-issuing bank and the POS bank are different, first obtaining authorization and then running the clearing process to finalize the transaction is called Dual Messaging. So why is a dual message structure needed?