As any ltl driver knows, some customers are required by their big bosses to stamp all company bills with "subject to inspection" or something to that degree. I've got a few small customers on my route that also do that. We are required by our terminal manager to give these bills over to him or the ops manager. They then white out whatever was stamped or written(exception is os&d notations as long as it has an exception number) then they make a copy and dispose of the original. Seems quite fraudulent but after 10+ years nothing really suprises me anymore.