Asked to return Tivo box.

We got a new 360 box about a month ago to replace the Tivo and the instructions said to return the old equipment if it was one of several types (the Tivo wasn't listed).  It pointed us to a recycling page with info on disposal, so we disposed of it.

Now we have received a request to return the Tivo.  I expect it is just a general email that doesn't actually check what should be sent back.