Wow.! Your package is very big compare to me. Mine is just an envelope.
I asked proof of signature but Canada Post receptionist said she can't do it for mail more than half kilo weight. !! This was strange. I only had a tracking number and I know that they received my application.
The canada post guy said no signature since it's a gov agency. :\
My package looks just as big as that, and all I did was print 1 day of 1 month of chat for the past 12 years, and that alone added up to a huge box. Imagine every day of every month over a period of 12 years. Wouldn't fit in the entire house!