FormatOptional parameter for merchant information (per payment request)
- In case of Paypal this parameter is passed to Paypal as
"PAYMENTREQUEST_n_CUSTOM" to appear as merchant customizable value in Paypal settlement files.
- Only used for reporting purpose on PMI-export “Export -> Payment events”.
- param is an individual parameter per payment process, which can be exported with PMI -> export -> payments
- transaction_param is an individual parameter per payment request which can be exported with PMI -> export -> payment events