I am in the same position and have been advised to NOT contact the CA. We had one brief conversation and they sent me partial documention of the "debts'. Remember the CA is not out to help you. They are low paid employees and the CA has either bought the debts from the city or gets paid a commission from the city on the amounts they collect. SO they will not get you out of it! If you do not answer their letters, return their calls and DON't GIVE out your phone number or employer information they will most likely go away, especially since these are old "debts".
Based on my research online, conversations with CT dept of policy and Attorney General office, keep in mind the following:
-the statute of limitation for these "debts' is 15 years. after that you are not obligated to pay
-The CA cannot sue you, & cannot garnish your wages
-The "debts" can only be reported within a seven year time period of when they were do. So if the city realized you "owed them" money, which I doubt they did, the debts would have already been on your credit report.
From what i have been reading, the city is having financial challenges and recently increased real estate property taxes. So it seems that they have found all these auto tax payments that they never contacted individuals about. Maybe they had a computer malfunction for 10 years???
hope this helps.