+1(514) 937-9445 or Toll-free (Canada & US) +1 (888) 947-9445
Not sure if it changed but I was required the IMM5409 form, filled/signed by a Notary Public in my country of residence.

I applied in August last year though, so I am not sure if it is still needed, as canuck_in_uk pointed out.
 
It still appears in my personalized checklist. Any comments on this? Do I need to still fill ouy IMM5409. My girlfriend is Canadian