That's been my one line of defense against knockoffs after hearing in the past that was the case. Whereas an item that's "Sold by Sony and fulfilled by Amazon.com" will pay Sony for the sale but might actually use co-mingled inventory that came from a fraudulent seller.

I guess neither of them address the problem in the article though which is now a new source of issues I didn't know I needed to be looking out for, of getting a return which may have been tampered with or swapped out instead of a brand new product.