goodman36 said:Yes, it is applicable. The Sponsor only has to provide it.
As long as you filed taxes using your SIN#, there is a Option C document kept by Revenue Canada. It shows whether you have received any social assistance from government. Call Revenue Canada and they will mail you one (it's free).
Agreed with the above. The Option C is a requirement even if you are self employed (self employed people still pay taxes) and even if you're only sponsoring your wife. It should only take a couple of weeks to arrive so call as soon as you can.