I noticed that mine doesn't have warranty stickers either, so I guess they're on the inside as well.
But, um, small question: how do they put them on the inside in such a way that you can't open the unit without breaking them? Seems like a sort of catch-22, unless they include a tiny gnome that does the sticker application and then lives inside the Empeg. And if that's the case, why couldn't they just ask the gnome if it's ever been opened? I guess it must be a tiny invisible gnome, though, since noone ever reported seeing a gnome upon opening their Empeg.
Hmm...curiouser and curiouser...
Alex