Hello,
We (My wife first and then I) received a very similar call from a lady ("unknown" number) who tried to pull the same thing with me. I told them that I don't have any application in process with CIC and that we already have received our Permanent Residency last year. Then she tried to threaten me with the same stuff, and went a step further by stating that the Canadian High Commission in India has filed a report with the CIC on 22 Dec 2014 after trying to contact me for the "Unique Identification Number" (UIN) as it is missing in my file and that the case was now being handles by CIC in Ottawa. I then tried to inquire what this Unique Identification number is? The responded that like SIN in Canada a Unique Identification Number is provided in India. This was required by CIC/Canadian Government due to some "rule" changes. I suggested then that she might be looking for AADHAR number and told her that I can provide this number if necessary. She then completely lost it and started speaking very loudly saying " Sir, you need to listen to me. Let me finish. It is not a Indian Driver's License number, It is not an Income Tax identification number that is also referred to as PAN, and it is also not a Unique Identification number provided by the Indian Govt also referred to as AADHAR. This is different number." She then tried to threaten me that if the CIC's legal department calls me in the next 1 to 5 days and then I can't provide them the UIN then my stay in Canada could be jeopardized and it is a very serious matter. She then suggested that either I would have to fly back to India to take care of this in the next 5-10 days or they could send the case back to India and provide me with a case officer that would be coordinating things for me from here in Canada. At this point things got very confusing and unclear for me. I told her that if I needed to got to India to take care or this I can do that, no problem. But, I have to first figure out and know exactly what number it is that they are looking for. I asked her to give me her contact information so that I can find out what it is, and call her back before the end of day. She then said that she would forward my file to legal and copy/provide all the information in an e-mail to me which includes here contact information as well. She suggested that after going through the e-mail, I could call her if I have any questions. It has been 3 hours since the phone call but I haven't received any e-mail yet.
I have since then found this page, have reported this incident to the local police, informed the Canadian Anti Fraud Centre, and I'm sending an e-mail to CIC as well. I just wanted to share my experience so that whoever follows this is also aware.
Regards
SaVa