Do I have to manifest my Canada Post shipments?

Yes. Canada Post requires you to manifest your shipments.

To do this in EasyPost, we have further documentation on how our batches and manifest scan forms work.

Additionally, if you have a credit card on file with Canada Post, they can charge you without your shipments being manifested, but this is not advisable as it may cause issues with your eventual shipments. As a rule, manifest every shipment you make with Canada Post.