https://www.canadapost-postescanada.ca/cpc/en/support/kb/business/postal-code-targeting/how-to-prepare-postal-code-targeting-mailings.page
Support: How to prepare Postal Code Targeting mailings | Canada Post
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https://www.canadapost-postescanada.ca/cpc/en/support/kb/business/postal-code-targeting/is-your-mailings-design-machine-processing-compatible.page
Support: Design machineable Postal Code Targeting mail | Canada Post
Ensure that your marketing mail pieces for Postal Code Targeting are machineable and save on mailing costs.
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