What is the validity of bill of lading?

The bill of lading is perfectly valid so long as the source of it is.

A bill of lading simply states the commodity being shipped, quantity, shipping weight, special instructions, seal number (if applicable), etc.

While it states what should be present during shipping and delivery to the recipient, a bill of lading in no way guarantees that mistakes cannot be made during the loading of the commodity into the shipping container/trailer, nor does it absolve parties involve of responsibility for overages, shortage, or damage to the commodity as a result of mishandling or improper load securement.