Two driving tickets from Italy

I got two driving tickets while driving around Verona. The letters are coming from "Comune Di Verona" Centro Servizi internazionali.

I've been trying to pay, but I so far none of the payment options work for me. Ideally I'd like to pay since my wife wants to go back to Europe in the near future, but what could really happen if I am unable to pay?

I saw some message on here where people have not paid, gotten a call from collections, ignored it, and not had anything happen after 2+ years.

I am a bit more concerned since these letters seem to be coming from the local government's approved fine collector.

Can anyone shed some light for me?