Shipper's communication to their freight forwarder or carrier including all the detail of the shipment. This communication is used by the forwarder or carrier to complete the bill of lading and other shipping documents.

Abbreviation: SLI A document containing instructions given by the shipper or the shipper's agent for preparing documents and forwarding (air cargo).

A form used by the shipper authorizing a carrier to issue an air waybill or (BOL) bill of lading on the shipper's behalf. It contains all details of the shipment and authorizes the carrier to transport the cargo on behalf of the shipper specific instructions.

A form used by a shipper to authorize an airline to issue an air waybill on the shipper's behalf. The for contains all details of shipment and authorizes the airline to sign the air waybill in the name of the shipper.

These instructions, often prepared along with a Shipper's Export Declaration, are the exporter's direction to the freight forwarder on how to handle the exporter's shipment. The information prepared on the SLI includes a description of the goods and containers, the ultimate consignee, shipping method desired, insurance requirements, and special instructions pertaining to the shipment.