What a Shipper Letter Of Instruction Actually Looks Like
A Shipper Letter Of Instruction is the document you send to your freight forwarder or customs broker telling them exactly how to handle your shipment. It covers everything from which trade terms apply, to what goes on the commercial invoice, to who pays the duties, to any special handling requirements. Without it, your forwarder is guessing, and guessing costs money in delays and misclassification fees. The thing nobody tells you is that a lot of people confuse this with a packing list or a commercial invoice. They're not the same. A packing list tells the warehouse what's in the boxes. A commercial invoice tells customs the value. The Shipper Letter Of Instruction tells the logistics team how to move the whole thing correctly. Mixing these up is the most common mistake I see, and it happens because people treat the SLI as just another form to fill out rather than a directive document. I spent three years watching people waste time on rework from bad SLIs. One shipment I handled had the wrong Incoterm coded into the instruction sheet. The goods were already on a vessel bound for Rotterdam before anyone noticed. The forwarder had booked everything under CIF when it should have been FOB, which meant the buyer's insurance didn't kick in properly and we were stuck arguing with three different parties about whose risk started where. It took two weeks and roughly four thousand dollars in legal fees to sort out. That cost more than most people would spend on a proper freight audit.
Shipper Letter Of Instruction Template Breakdown
Most companies use a template, but the field names vary by carrier and forwarder. Here's the standard structure and what each section actually means in practice. Shipper and Consignee Details: Full legal name, address, tax ID, and contact information for both parties. This sounds obvious but I've seen shipments stalled because the shipper's EIN didn't match their corporate registration. Customs cross-checks this now and it will flag your cargo. Incoterms and Payment Terms: Specify the exact Incoterm version (Incoterms 2020, not 2010). The year matters. Different versions have different rule sets for transfer of risk. If your contract says CIF but you write "CIF 2010" on the SLI while your actual trade agreement uses the 2020 standard, you've created an inconsistency that customs or your insurer can exploit.
Commodity Description and HS Codes: This is where most errors happen. The commodity description needs to be specific enough for customs classification but general enough to avoid confusion. "Electrical transformers, oil-filled, 500 kVA" is better than just "transformers." Pair this with the correct HS code, and always verify it against the destination country's tariff schedule. The US HTS, the EU TARIC code, and China's customs tariff all differ slightly at the 10-digit level. Carrier and Routing Instructions: Name the preferred carrier, the route, and any transshipment points. If you allow alternative routing, state it explicitly. I once had a forwarder reroute a temperature-sensitive shipment through Dubai because the direct flight was full, and the SLI didn't explicitly prohibit it. The cargo degraded because the cold chain wasn't maintained during a 14-hour layover. Documentation Requirements: List every document the forwarder needs: commercial invoice, packing list, certificate of origin, bill of lading, insurance certificate, export declarations, phytosanitary certificates if applicable. Be specific about who provides each one. Ambiguity here means someone forgets and the shipment waits at port.
Get the Full Details
Special Handling and Compliance Notes: Dangerous goods declarations, hazardous material classifications, IMDG code references, stackability requirements, and any sanctions compliance statements. If your shipment contains anything that could be classified as dual-use under your country's export control regulations, flag it clearly. The US Commerce Department's Bureau of Industry and Security has specific reporting requirements for certain items even when they're not technically controlled.
How to Build One Without Losing Sleep
Start with your sales order or purchase agreement. Every detail in the SLI should trace back to something written there. If the sales contract doesn't specify an Incoterm, don't guess. Ask the buyer or your trade finance team before you draft anything. Use a living document approach. Most forwarders will accept a one-time master SLI that covers recurring shipments between the same two parties, with a shipment-specific cover sheet for each move. This cuts drafting time from an hour to maybe fifteen minutes per shipment. Keep the master on file and update it whenever your trade terms change. Get sign-off from someone who isn't directly involved in moving the goods. A salesperson who negotiated the deal might overlook a customs detail that a logistics coordinator would catch. Cross-verification catches errors before they leave your desk.
Keep a copy of every SLI you issue for at least five years. Not because you think you'll need it, but because when a customs audit or insurance claim comes up three years later, you'll thank yourself for having the exact instruction sheet that was in effect at the time of shipment. There are free templates online, but they're usually generic and miss region-specific fields. The EU requires an Additional Procedure Code on some SLIs. Japan requires a separate import authorization reference number in certain cases. If your shipments go anywhere beyond your home market, you need a template that accounts for those requirements.
