Fines received after visiting Pisa
This article which I’ve recently prepared, should help a little:
Fines received after being in Rome
Information about paying fines received while in Rome, from the Rome Council site:
Call Rome 060606
One number, a whole city
060606 is the telephone number to call for information on the services provided by the City of Rome.
The service is available in English from Monday to Saturday, from 4pm to 7pm.