What are Permanent™ stamps? | Canada Post
https://www.canadapost-postescanada.ca/cpc/en/support/kb/sending/stamps-packaging/what-are-permanent-stamps
WEBOne PERMANENT stamp can be used to mail a letter (weighing up to 30 grams) anywhere in Canada. You can also use PERMANENT stamps in conjunction with additional postage to mail larger letters, parcels or to send mail internationally. What you can do. PERMANENT stamps are available in booklets and coils. Buy stamps online.
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