Consignor

A person who sends goods to the agent (consignee) for sale on commission is called consignor.

The shipper, in a contract of carriage, is that the person sending a cargo to be delivered whether by land, sea or air. Some carriers, like national postal entities, use the term "sender" or "shipper" however within the event of a legal dispute the proper and technical term "consignor" will generally be used.