Tax authorities usually not going for old reports, even notorious IRS don't go past 6 years and usually it's within 3 years.The magic TIN missing is in no means any obstacle for a successful report. The name and birthday on file are more than enough to ensure a match at the locals tax office.
At best it serves as an indication that report might not take place right now but they could equally just decide to report some past periods in the future.
I would not bank on this secrecy.