Earlier quoted context omitted.
I bought a product on Amazon this Christmas that was completely fake. It was "sold by Amazon" but didn't even have the same label as the brand I had ordered. I complained to Amazon and they just gave me a refund without requiring that I return the product (I ended up just throwing it out). I suspect that they knew the inventory was tainted but figured the cost of dealing with noisy customers like me is less than the…
If multiple suppliers ship same product to Amazon warehouses Amazon will ship closest one to buyer regardless who supplied it. In fact if the seller requests their goods back they won't get the same ones they sent to Amazon - they are mixed together with others sharing ASIN There must have been an Amazon marketplace seller using same listing but shipping fakes. Or Amazon got duped.
If it's true that they do not track products by suppliers, this could be a scalable fraud. Send in absolute garbage and take it back/buy it to enrich your metarial.