‘UPS hereby notifies you that we have received electronic information about this package we're supposed to be sending to you. We may or may not have received the actual package, but we know we've got the electronic information. For more details, see the following tracking URL which will still tell you we don't know if we've got the package or not. P.S. The colour brown is a vigorously defended trademark of United Parcel Service.’

Looks to me as if someone's been putting more effort into IP land grabs than into the sanity of their tracking system…