No idea. When I said me, it's actually my wife did it all (since it was registered to her). She said she filled out a form, which was in the OP and mailed it in. I should note that I haven't actually *seen* the old iPod in a while; I'm just going off what she said that it was still working well and that she didn't send it back. She might have and forgotten or misunderstood what I asked, though (maybe she thought I asked if she still had the old one).
edit: she said it's the iPod she mailed off. That makes more sense.