Last year, the controversial striker was voted player of the year by the London Owls supporters' club, an award for which he received a silver trophy worth pounds 85.
The London Owls want the cup back before they name this season's recipient before the match against Liverpool in Sheffield on 8 May - but Di Canio made his acrimonious departure to West Ham, after a long spell in Italy suffering from depression, without returning it.
London Owls' secretary Paul Woolfson said the branch had been referred to an intermediary. He said: "We were told first that Paolo did not remember receiving the trophy, and then that he thought it was his to keep.
"But when the presentation was made, at the Villa game at Hillsborough last May, Paolo was made fully aware that he was supposed to return the silver cup.
"Obviously, all that spiel he came out with about how Wednesday fans were great means nothing now."Reuse content