Just for the heck of it (!), I checked www.state.co.us and followed
endless links to the Revenue Department, and found out that Colorado has
DEALERS do the registering for them, and has rules as to how and when
the fees get sent in. Kind of like turning the henhouse over to the
fox, but that's Colorado for you. If you buy a moped there, your name
is on a list someplace (though not all counties have dealers, I'd
guess). If you brought it in from another state, then ?????