Alpari us W8ben form ???

Hi all,
Does any one know what is W8 ben form to open an account with Alpari us. I am in the process of opening an account with them and they want me to fill this form when I called them the front desk reported that it just an formality for ID purposes, not satisfied with the answer. I live in Canada.

Google 'w8ben form'. Read the first two results with a PDF. One is the form the other is the instructions.

Thanks nvwine, Now why didn't I think of googling it. It makes lot of sense now. Too much paperwork to setup an account !!

W-8 Ben from my understanding is a tax emption form.

I think...

Otherwise U pay payin the US tax man.