The fine notice contains all the instructions for submitting a written defense, which you can also find here:https://www.at-bus.it/en/fines
Note: submitting an appeal does not stop the payment deadlines.
Remember that if you pay the fine, you cannot contest it.
TIPS: if you received a fine but have a valid pass, you can go within 15 days to one of our ticket offices, where you will find the Defensive statement form to fill out. Bring the fine notice, your travel ticket, and your health card (or tax code) with you.