If you have a shipping list in a box and no items to match it, it is a shipping list for separates shipments. Date stamp the shipping list Check the item numbers in the item selections printout and mark any items not selected as 'NS' If any of the boxes from the shipment have been received, open and process as usual.
Separate shipments come in over a period of time.
To decide whether it's items should have been received, check the date stamp on the shipping list.