If we want to cancel a transaction sent to FSA, the button "Create Cancel" should be used.
Find the transaction and click the button "Create Cancel" to create a cancellation transaction for this transaction.
A cancellation transaction has been created with all necessary information.
The cancellation transaction has status "Ready to be sent" and can be sent to FSA. Navigate to Outgoing Files to batch and send the transaction.
The cancellation transaction has the same External Transaction ID as the other transaction. Use the filter "External Transaction Id" to find the two transactions.
When the canceling is complete (when we received a updates from FSA), the canceling transaction will get status Accepted and the first (original) transaction will get the status Cancelled.