What is a packing slip?

Packing slip is a slip that contains fulfillment order data. For example lets say you have two locations "warehouse 1" and "warehouse 2". If an order comes in with items from both locations the order will be split into two different fulfillment orders. With packing slip you can access the fulfillment order and get a slip with data from that specific fulfillment. Packing slips are a great way to show customers what is supposed to be in the shipment. If you send two different packages from those locations to the customer they can easily see what is inside, where it came from and other information you like to share.