From Longman Dictionary of Contemporary Englishconsignorcon‧sign‧or /kənˈsaɪnə $ -ər/ noun [countable] technical BBTthe person who sends goods to someone else
Examples from the Corpus
consignor• The drawing had been published in 1935 in connection with the painting, yet both consignor and Sotheby's had been ignorant of this.• The sea waybill also allows the consignor to vary his delivery instructions to the carrier at any time during the carriage.From Longman Business Dictionaryconsignorcon‧sign‧or /kənˈsaɪnə-ər/ noun [countable]1TRANSPORTa person or organization that sends goods to someoneSYNSENDER2COMMERCEa person or organization that sends goods to someone acting for the owner, who has agreed to sell them for the ownerThe consignor has been paid by the auction house, but they have not yet been paid by the purchaser. → compare consignee 