We received a traffic (parking) citation in Lucca in 2017. I contested one of the citations and wired money to the municipality paying the second. I never received a response or confirmation of either contesting the one parking citation or receipt of payment. This weekend, four and a half years later, I received two letters, one related to each citation, from Cedars Business Services saying they will start collections on this unpaid debt. A quick online search uncovered a long list of BBB complaints from people having the same experience. This is both a warning to avoid this company and this scam, and request for others to share if they've had similar experiences with this company.
Here is an interesting website on tickets in Italy.
Wow, very detailed information. Nice website, too - better than many of the travel blogs out there.