On Mon, 10 Jun 2013 20:26:11 +0200, nestork
wrote:

No, you're right, they probably didn't, and they should have. I'm sure
there would have been plenty of Canadian customs brokers willing to fill
out the necessary forms free of charge, but all that should have been
done before the truck even left Windsor. Doing that while the truck is
sitting at the border is just lousy planning and terrible management.

See: Bill of lading

"A bill of lading is issued by a carrier, details a shipment of
merchandise, gives title to the goods, and requires the carrier to
deliver the merchandise to the appropriate party." (Wiki)

In America.