Originally Posted by Eeyore
Official erratum to Canada Post Accelerated Package service.
As of last week accelerated package service chosen by being a member of the CP Venture Club is no longer guaranteed. Which means that it is not the exact same as regular only slightly less (marginally) expensive. If you need a guaranteed delivery by date you need to choose Express.
Where did you see that? They don't even have a service called "Accelerated Package Service". It's Regular, Expedited, or Xpresspost.