What is apple doing to prevent erasure after a legitimate transfer? Happened to me, I lost countless hours getting access back and rebuilding / restoring.
While it can happen on any devices, my happened on a MacBook pro. The end user sold it in the aftermarket, I bought it through the middleman. While the unit had been "wiped" (not completely -- I discovered the first owner's contact data through file reconstruction), a remote wipe ended up happening from the original users active iCloud account (first user denies initiating the remote wipe).
MacBook Pro