I have noticed recently that the
Canada Post Xpresspost computer-generated labels stuck on postings / mailings have the POCON number on them as the first 8 characters in the number.
So far, I have not seen that any
Registered post labels have any POCON numbers.
The newer
Meter stamps / labels having a gray stripe along the upper edge and a white stripe along the bottom edge also have the POCON number on them, as the last number printed on the lower right-hand corner.
POCONs are also found on the
tags left behind by the delivery person when you are not home, for the Post Office where the item will be held at for pick-up by you, and on the
postcard mailed to you by the sortation plant and the
postcard mailed to you be the receiving Post Office.
All of these could be collected, if politely asked for, as some postcards are taken by the Post Office when you ask for your parcel / envelope and are then discarded in the trash.
These are all confirmations that the Post Office mentioned on a cancel has the same Postal Code and / or town name on the same date sometimes.
I have a couple of larger envelopes coming that have examples of meters and Xpresspost labels, along with the POCON cancelling stamping on the envelope that I will post when I have them.