The Cancel Included Invoice Customer Payment Order Details activity is used when all invoices and pre-payments for a specific customer payment order ID are to be cancelled. A customer payment order cannot be deleted before all included items are cancelled.
This activity requires that the status for all included invoices and pre-payments in the actual payment order is set to Unacknowledged in Customer Payment Order Details.
As a result of this entry, the invoices are removed from the payment order and the order can be cancelled.