Restore Deleted Transactions

Once an order is deleted, it is gone for good and there isn’t a way to “undelete” it. Consider disabling the delete permissions for most users to prevent this from happening again. Users without delete permissions are still able to mark an order as “Cancelled”, which does effectively the same thing as deleting the order, but rather than removing it completely, it leaves it in a state where it can be brought back if need be.

System > User Security. More information on setting up user permissions can be found here: Creating Users And User Security