Shipper's Letter of Instruction (SLI)
A document provided by an exporter to a freight forwarder or carrier that authorizes and instructs them on how to handle an international shipment. The SLI contains detailed shipping instructions including the consignee, routing, insurance requirements, customs documentation, and any special handling needs. It serves as the freight forwarder's authorization to act on behalf of the shipper for export compliance and documentation purposes.
Real-World Example
A US exporter provides a Shipper's Letter of Instruction to their freight forwarder, authorizing them to file the Electronic Export Information (EEI) with US Customs, book ocean freight to Rotterdam, and arrange inland trucking in the Netherlands.
Why Shipper's Letter of Instruction (SLI) Matters for Shippers
Proper documentation keeps your shipment moving and protects you legally. A Shipper's Letter of Instruction (SLI) that is incomplete, inaccurate, or missing can trigger detention charges, customs holds, or denied claims. Mastering the paperwork side of freight shipping reduces delays, lowers your liability exposure, and ensures smooth handoffs between carriers, warehouses, and receivers.
Common Questions About Shipper's Letter of Instruction (SLI)
What happens if my Shipper's Letter of Instruction (SLI) is filled out incorrectly?
Errors on a Shipper's Letter of Instruction (SLI) can cause delivery delays, billing disputes, customs holds, or denied damage claims. Always double-check shipment details — weights, piece counts, consignee information, and special instructions — before signing. Correcting mistakes after pickup is significantly more difficult and expensive.
Is a Shipper's Letter of Instruction (SLI) legally required for freight shipments?
In many cases, yes. Federal and state regulations mandate certain shipping documents for liability, insurance, and customs purposes. Even when not strictly required by law, a properly completed Shipper's Letter of Instruction (SLI) protects both the shipper and carrier in the event of a dispute or claim.
Can I manage my Shipper's Letter of Instruction (SLI) digitally?
Electronic versions of freight documents including the Shipper's Letter of Instruction (SLI) are increasingly common and legally accepted. Digital document management reduces errors, speeds up processing, and creates an automatic audit trail. Ask your broker or carrier about their electronic documentation capabilities.
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