After completing this how-to you will know how to create a credit invoice in Kofax Invoice Portal.
Perform the steps to create an invoice, see How To here:
Make sure the Invoice type is set to Credit.
The amounts must not be negative, the Invoice type setting makes sure the sent invoice is correctly typed with a credit amount.
Send the invoice the same as a regular debit invoice.
Read more in the Invoice Portal online help file https://invoiceportal.kofaxcloud.com/Default.htm#Pages/invoice_edit.htm?Highlight=credit