
Quoting
pg1067
Can you please clarify what you mean by "a bill . . . for processing the traffic citation"? How is this different from the actual citation itself? How much was the payment you made to the rental car company?
1. Pay.
2. Ignore the thing and don't pay.
3. Make an inquiry of the entity seeking payment to confirm, e.g., that it has authority to collect on behalf of the Italian municipality.
It's not, so you either misread something, don't recall it correctly, or the thing you read was wrong.