That's right in that there is no consistency. Here are the first few lines on the communication I received from my processing office (Etobicoke) and VO of Vancouver:
Note from the processing office
As the principal applicant, you will be contacted directly by your local IRCC office and scheduled for a landing interview. The below instructions are for your overseas dependant(s) only. All instructions and due dates are to be followed by your dependent(s) only once you (the principal applicant) have become a permanent resident in Canada.
Dear XXXX,
The processing of your application for permanent residence in Canada is almost complete. You must complete the following steps within 30 days in order for our office to issue your Confirmation of Permanent Residence and, if applicable, permanent residence visa. If for any reason you are not able to meet this deadline, please inform us immediately by email to:
CPC-CTD-Ottawa@cic.gc.ca with details concerning your situation.
STEP 1: UPDATE YOUR APPLICATION......