Shipper's Letter of Instruction (SLI)

Definition

The SLI is a mandatory legal document that conveys the exporter's specific instructions for the efficient and compliant processing of an export shipment. It functions as a comprehensive checklist and authorization form, ensuring the forwarder understands the cargo details, desired routing, and specific documentation needs.

Core Function and Authority

The primary function of the SLI is dual: instruction and authorization.

It instructs the freight forwarder on essential logistical elements, including:

• Shipment details (description, weight, dimensions)

• Requested carrier and routing

• Required insurance and documentation (e.g., Certificates of Origin)

• Specific delivery instructions

Crucially, the completion of the SLI grants the forwarder permission to act as the authorized forwarding agent for U.S. export control and customs purposes. This authority is vital for filing the Electronic Export Information (EEI) via the Automated Export System (AES). All U.S. export shipments require a completed SLI.

Expert Advice

While templates are available, always use the SLI provided by your dedicated freight forwarding partner, as it will be optimized for their internal systems and required compliance checks. Initiate the completion process immediately upon shipment initiation. Accuracy is paramount; errors on the SLI can lead to customs delays, fines, or regulatory non-compliance. Review all Schedule B codes and destination control statements before submission.

Key Takeaways

• The SLI is mandatory for all U.S. export shipments.

• It grants the freight forwarder legal authority (Power of Attorney).

• It dictates precise handling and routing instructions.

• Prompt and accurate completion prevents customs delays.