On the fine notice you will find all the instructions for submitting a written defense.
You can also download the written defense form here https://www.at-bus.it/en/fines
Note: If you dispute a fine, the payment deadline is not suspended.
Remember that if you pay it, you can no longer contest it.
TIPS: If you need a paper form, you can request it at one of our ticket offices within 15 days of the penalty.
Please note that the ticket office does not handle fines! To submit a written defense, follow the instructions provided on this page here https://www.at-bus.it/en/fines