I once bought an MP3 player, and the bill inside the package featured an ID number in extra-big letters -- for video documentation, as the small writing said. (

I once bought an MP3 player, and the bill inside the package featured an ID number in extra-big letters -- for video documentation, as the small writing said. (They didn't offer me the videos except in case of dispute, though). Since the player in question was a Frontier Nex IA, this must have been quite some time ago.