I read that they made internal changes to tag shippings properly to reduce the risk of that behaviour, but am not sure it is true or has been effective.
When I researched this a while ago I was unable to come up with much compelling evidence that it was an actual thing. It certainly has not happened to me over thousands of purchases - or anyone I know for that matter. Of course a fake could have been so good none of us could tell, but I do actually attempt to inspect carefully.
I have found counterfeit items from other web stores not on Amazon so it’s not like my detection skills are zero. Third party marketplace of course is different.
Heck, even Costco sent me an unsolicited refund for a counterfeit item they unknowingly sold me - so supply chain issues are bound to happen.
I don’t want to defend Amazon too much here, but this one is almost at urban legend status to me. Likely happened at limited scale some time ago, but it’s strange everyone says it’s endemic but no one IRL I know across probably tens of thousands of purchases has noticed it.
F-4 Storage
We will provide storage services as described in these FBA Service Terms once we confirm receipt of delivery. We will keep electronic records that track inventory of Units by identifying the number of Units stored in any fulfillment center. We will not be required to physically mark or segregate Units from other inventory units (e.g., products with the same Amazon standard identification number) owned by us, our Affiliates or third parties in the applicable fulfillment center(s).
https://sellercentral.amazon.com/help/hub/reference/external...
That combined with years and years of anecdotal reports of this happening certainly suggests a "where there's smoke there's fire" situation to me.
