What is the purpose of a shipper's letter of instruction?

The purpose of a shipper's letter of instruction is primarily to convey key information about the shipment. This document serves as a communication tool between the shipper and the carrier, outlining essential details such as shipping instructions, destination, handling requirements, and any special considerations necessary for the transportation of the goods. By providing clear guidance, the shipper's letter of instruction helps ensure that the shipment is handled correctly and efficiently, reducing the risk of errors or miscommunication during transit.

While the other options may relate to aspects of the shipping process, they do not capture the primary function of the letter itself. Documenting shipping fees is typically handled through invoices or shipping agreements, obtaining insurance involves different documentation specific to risk management, and registering shipments with authorities may involve customs forms, which are distinct from the letter of instruction's role. Therefore, the central function remains focused on the communication of shipment-specific details.