Whilst in Italy this chap from the UK entered a restricted zone 44 times without realising. 
He received a fine totalling £8500 in the post.
honestjohn.co.uk/askhj/answ … o%20I%20do
“I have received £8500 fines for driving in a congestion zone in Italy - what do I do?
I have received a bunch of fines for driving in a ZTL (congestion zone) in Italy. I am aware that by law Italy can take a year to deliver the fines. Will they sell my debt to an international recovery agency so as to take me to court in England and affect my credit rating or not? The fines amount to £8500. I didn’t realise I was in a restricted area 44 times”.
Asked on 20 May 2019 by Peter Newton