Thankyou for your helpful answers….Yes, AOR is the acknowledgement that you receive after submission.
For the list of documents, scroll to page 1 of this thread and you will find the standard package that IRCC requests for spousal addition.
Do begin requesting your spouse's PCC which takes sometime to get them. Also, the proof of funds are not requested by IRCC but as FSW, it needs to be updated with new funds for 2 people.
Actually my agent told me that your CRS will be recalculated and my ITA would gets cancelled…so i was a bit worried for spouse addition…