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This could be the most closest possible explanation floating around AORs.

But, the IRCC website clearly states -

We’re now sending AOR letters or emails for paper and online applications received the week of September 23, 2026.

The definition of received is stated as -

We receive your application right after you submit it.

  • You immediately get an email that confirms you’ve successfully submitted your application
No completely wrong. You submit and you get an automated email just like in paper format post delivers. Receipt is the date they open and file it.
 
This make sense.
That might be reason status changed to “import to gcms” or uploadedtogcmsstatus as “True”.

But at same time not sure why some from October applicants got AOR.
They are very very few applicants who get sooner than normal. One I know he had very straight file. He started to work just immediately landed....
 
Type: Online application
Location: Saskatoon, SK
Physical Presence Days: 1099
Application: Family : 1 adult and 1 minor
Application sent: July 23, 2026
Delivered: July 23, 2026
AOR:
Finger print requested:
Finger print sent to RCMP:
Tracker Created:
Background verification -
Physical presence -
Prohibitions -
Language Skills -
Citizenship Test -
Citizenship ceremony -
 
No completely wrong. You submit and you get an automated email just like in paper format post delivers. Receipt is the date they open and file it.

I pasted everything above from official IRCC website. Blame IRCC not me ;) . You interpretation might be different. Atleast by their website, it says received means submitted and the date September 29th is received = submit != opened