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Table of ISO 8583 amount and currency field values for a sample transaction

ISO 8583

ISO 8583 Field Descriptions (F4, F5, F6, F49, F50, F51)

Fields F4, F5, F6, F49, F50, and F51 are the Amount and Currency fields sent in the authorization message. For example, for a 300 Euro transaction, the amount and currency information sent in these fields is as follows.

Table of ISO 4217 currency codes by country for ISO 8583 field F49

ISO 8583

ISO Currency Code Values

Currency information for card transactions is sent in fields F49, F50 and F51. The ISO currency values that can be sent in field F49, which carries the original currency value, are listed below.

ISO 8583 field 9 settlement conversion rate

ISO 8583

ISO 8583 Field Descriptions (F9)

DE 9, Conversion Rate, Settlement, carries the settlement conversion rate. It is an 8-digit numeric value: the first digit shows the decimal position from the right and the next 7 digits show the value.

POS terminal used for processing card payments at a merchant

Merchant & POS

How Does a POS Device Communicate with the POS Bank?

A POS is a functional device with its own dedicated software, customized to the authorization system of the bank it is connected to, that accepts credit or debit cards. The POS and the authorization system communicate using the ISO 8583 standard.