All you should have to show them is a copy of the death certificate. You get about 10 copies from the funeral home to send off to CRA, OHIP etc.. Them asking for the Will is BS.My father recently passed away and now we are in the process of changing his name on all accounts over to my mothers name. We call up Bell, Union Gas, Reliance, Hydro and water. All no problems, changed the name right away. We call up Rogers, they can't change the name unless they see the Will.