Hmm, if it was shipped USPS, there is a department that
warehouses all of
that unreturnable and unforwardable mail.. read about it in Smithsonian
once.. they even had some guy's ashes on the shelf, and due to that article,
the family who was related to him was able to contact the USPS and retrieve
his remains..
OTOH twice a year the regional dead letter places have an auction.