I am a Chartered Accountant and there is no such thing as "ligit telemarketers that work under Revenue Canada".
CRA does not authorize any body, even Chartered Accounting firms, to call people for anything such as audits or tax reviews.
The only time Revenue Canada will contact you is when they want to verify your claims on your tax return such as tuition fees, medical expenses, child care expenses and the like. And they will send you an official letter via Canada Post, not by phone calls nor by e-mails.
Received a call ,from a southern u.s. accent calling himself either detective Eric or Derrick Foster, from a hot line divisionist, said i better not ignore this call, that I or my lawyer should call him back at the above phone number, and if I don't, then Good Luck to me! There will be dire consequences ! Another scammer, but this one threatens you!!!
These a-hole scammers are back, but with their number hidden "Private Caller". Consumers Home Services tries to make it sound like they are doing a government safety check, but really, they are just trying to get their high pressure salesman in your door and pressure or trick you into getting a shoddy, sub-par furnace and/or water heater.
Consumers Home Services will try to scare you on the phone about how your furnance might be unsafe - Do not fall for these scum of the earth scammer's trick. They are worse than the duct cleaners.