Originally Posted by Scopedog
CP will leave a failed delivery notice if nobody is available to sign for the package. It will state which postal outlet you can pick it up from. A maximum of three such notices will be left with the last one clearly stating "final notice". Your final notice slip won't arrive until the package has been sitting at your local postal outlet for a couple of weeks.
Having said that, there is the chance that the delivery person will leave it outside your residence. Technically, they are not supposed to do this if it requires a signature. Unfortunately, there are people here that can attest to this being done with alarming regularity in certain areas.
I heard CP people sometimes dont leave notices, just your package. Well, that's IF I know my package has left customs. It still says "Item on route to Canada"