Shift4 has a notes field that’s displayed within an individual transaction record in Shift4's Gateway. This is a free-form field that supports the use of HTML tags. The notes field is primarily used for the merchant’s reference and is not passed on to the processor. Escaped quotation marks should not be used in the notes field.
The merchant’s auditor can use the notes field to review data about a transaction, such as to determine the cause of a problem transaction or for chargeback defense. Depending on your interface design and/or the merchant’s desired use of the notes field, it can contain data such as the workstation used, items purchased, clerk notes, order number, or receipt details.
In a payment flow where multiple requests are sent, the notes field will be overwritten with the value sent in the last request.