List of failed orders can be viewed by :-
Selecting Jet > Jet Orders >View Failed Import Jet Orders Log from the menu section.
This section displays the failed orders with their order id and the reason for their failure.
To manually fetch the latest orders (if required immediately) the merchant can click on the “Fetch Latest Orders” button.
These orders can be deleted from here by :-
Select the orders to be deleted and then,
Choose Delete option from the mass Action drop-down and click Submit button.
If orders are not properly Acknowledged(due to any reason) then jet itself rejects those orders.