Anecdotal, but once I sold a GPU to a buyer (which I knew was working), who reported it as defective. He initiated a return and I accepted, as is part of the normal selling process. I then randomly received a toe ring from Amazon addressed to someone that was not me but at my address (luckily it was the name of my parents' dog, so I held onto the package). The buyer then called ebay and said the return was complete and provided the tracking to show it was delivered to me.
I was made aware of this when I got an email saying that the return was complete and the buyer had been refunded. I called ebay to dispute it, since I hadn't received a package. I looked up the posted tracking number, and it represented a shipment from FL to me (PNW) whereas I sent the gpu to NY. It also said the package was 1 lbs, which would have been impossible because the gpu was listed as over 2 lbs by the manufacturer. I explained this to the nice customer service rep. We agreed the buyer could have relocated in the past week but the weight was unexplainable. She couldn't undo the transaction but escalated my issue. A couple days later I got an email saying my case was closed and ebay was siding with the buyer, so I was out the $400 they paid for the gpu since ebay wouldn't release the funds. I was in shock, but I called usps because I thought I must have been missing something. Usps takes pictures of all mail, and the nice man on the phone that called me back looked up the package and described it to me. I then realized it was the nose ring Amazon shipped to me that I thought was a weird Halloween joke from my parents related to their dog. I then emailed every first.last@ebay.com explaining my issue, stating that I, as a seller, could no longer take on the risk of selling on ebay because I had no protection in the case of an obvious scam. The next day I got a call from a secretary, and I explained everything to her, including that, had this been my work, my president would have called me and others into her office and played the recording of this phone call, concluding with, "Go fix this and make sure it can't happen again."
I got lucky and was given the payout. Ymmv.