Pete is saying NOTIFY the CRA they can't ACT on the person you have in your pockets behalf. Only the SOLE AUTHORISED ADMINISTRATOR can. Apparently these people think they are AUTHORIZED to do it for you. Or they are atleast trying. :-D
Printed copy · Anthology Volume 7, page 165Printed copy from The Tender For Law Anthology, Volume 7, page 165 (printed 13 June 2014). Added by this site; not part of the Facebook export.