Prompt for Reason Box

Under Admin / Defaults / Manage System Defaults is an option "Prompt for a reason when deleting"

Once this is ticked, when any pending transaction is deleted a box will appear asking the user for the reason why this is happening.

It is essential that users enter the correct information in this box, if a payment has been assigned to the incorrect account, a pending invoice or purchase order deleted. Having the genuine reason this has been done will assist if it needs to be followed up on.

These explanations are recorded in Admin / Other / View Audit Trail. Selecting Details will show the reason entered.

See How do I Find a Deleted Transaction or Item for more on the Audit Trail.