The bill of lading is a document, issued to a shipper/exporter by a
carrier, that describes the goods to be shipped, acknowledges their
receipt and states the terms of the contract for their carriage.

Commercial Invoice:
A commercial invoice is the basic document from which the buyer
or importer pays the vendor or exporter. On import shipments, the
commercial invoice generally serves a dual purpose: to enable the
exporter to collect his/her money and to assist the importer in clearing
the goods through customs.

Packing Slip:
The packing slip is the detailed list of contents of the shipment including
quantities, items, model numbers, dimensions and net and gross
weights. A packing slip should specify per carton or crate the number
and type of units of material inside.

NAFTA Certificate:
The North American Free Trade Agreement is a preferential tariff
program, which allows zero or decreased duty for products that
qualify under the provisions of the agreement. Not all goods crossing
the U.S.-Canada border qualify for NAFTA treatment.