I just found that email from IRCC like below reached my email box.
UCI: xxxxxxxx
This confirms that your application for your Permanent Resident card has been received by Citizenship and Immigration Canada (CIC) on 2016/05/12.
MY NAME
Other Q&A sentences followed in the email.
It seems to me that it is AOR email that I referred to in my previous posting.
If so, my concern was relieved.
UCI: xxxxxxxx
This confirms that your application for your Permanent Resident card has been received by Citizenship and Immigration Canada (CIC) on 2016/05/12.
MY NAME
Other Q&A sentences followed in the email.
It seems to me that it is AOR email that I referred to in my previous posting.
If so, my concern was relieved.