In my area it depends on who is delivering the packages that day...
I have had no package and no slip but the post office called me saying it was 5 days there and going to be sent back.
I have had them just leave a package with no signature even though it needed one.
I have also been here when the package guy comes and they get out of van and just slap a slip on the door with no intentions of seeing if anyone was home.
All I can say is insurance lol and you you opt to pay for faster shipping with Canada Post (ex. next day shipping) and it doesn't make it by the delivery time just call and they will give a full refund.