On the order detail page, you are able to manually update the status of an order. If the order is in confirmation stage, you can process it by setting its status to completed stage. The system automatically delivers emails and codes for the customer. You can place a test order with your own contact details and manually process it to test the settings of your product in this way.
You can set an order status as refunded or charged backed and an email is sent to notify the customer that the order status has been changed.