You can cancel a service shipment that has been posted by mistake or contains some erroneous information.
Open the Posted Service Shipment window.
Click Shipment, Service Shipment Lines to open the Posted Service Shipment Lines window.
The program will now create a balancing service shipment line in the document. The values in the Quantity Invoiced and Quantity fields will be equal to the corresponding values in the initial line but with minus. The program will also generate the relevant ledger entries.
You will not be able to undo the service shipment that has already been invoiced.