Tonight I paid a 177€ ticket to Comune di Como for accidentally driving into the ZTL last October. I rented a Hertz vehicle for 3 weeks, driving through Emiglia-Romagna and Lombardy. All of my hotels got permission for my car, but while in the Lakes area I stayed in Bellagio and made a day trip to Como. It took from the end of October until April 2nd for Hertz to contact me, with every month the fine increasing. As soon as I got the email with the official fine, I contacted first Hertz to get guidance. I was told that they can no longer talk to their customers about Italian fines, which seems very strange. I then emailed the police in Como who said I had to wait to pay the fine. Tonight I spent 3 hours searching their web site for how to pay electronically as I knew the Como guidance was not correct...., what was supposed to be a 50€ fine, but found it had increased to 177€ because of the passage of time. Tough lesson to learn.
In July I will rent another car in Italy, but not from Hertz and I will be much more vigilant of ZTLs in the smaller towns.