I received a "new" vacuum cleaner today ordered from Amazon, but the seals on the box had been neatly cut.
The only that appeared to be missing was the warranty and registration card.
So, as far as I can tell, it was either an item that had been returned unopened and then resold to me, or else someone had deliberately stolen the registration card. Why would someone do this? Is there some way to make money by stealing appliance registration cards?