Shipper’s Letter of Instruction (SLI)

The Shipper’s Letter of Instruction (SLI) is an important export document that contains precise instructions from the exporter (or shipper) to the freight forwarder or carrier. It serves as an official instrument that directs how the shipment is handled, documented, and carried. The SLI often includes important information such as the consignee’s contact information, mode of transportation, preferred delivery terms (Incoterms), cargo description, export license numbers, and directions for issuing other documents such as the bill of lading or commercial invoice.

An SLI not only promotes easy communication between the exporter and logistics providers, but it also aids in regulatory compliance by identifying the necessary documents and approvals. SLIs can be generated and exchanged electronically through digital platforms like CargoWise, saving paperwork and the possibility of misinterpretation. This document also permits the forwarder to file customs declarations and coordinate with carriers on the shipper’s behalf. Overall, the SLI is critical to ensure that international shipments are completed correctly and on time.