Help! Just now on the highway in Italy from the Leaning Tower of Pisa to Cinque Terre, when I gave my card, no one collected the money when I exited the highway. I pressed the button for a staff member, and she said something (I couldn't hear clearly) and then opened the gate for me to pass through. Do I need to make up for the payment ?

You need to make up for it. When lifting the bar, your attention is all on: being glad to be able to pass, not noticing the machine printing the make-up form. If you have the make-up form, you can make up at any Italian post office with the form. If you don't have the make-up form, you can only search for 'punte blu' on Google Maps, and make up at 'punte blu' with the card you used to enter. If it's been more than 15 days, the car rental company will receive a fine and send it to your email. According to the email, you can pay the fine through a bank account. As long as the delay is long enough and the payment is not successful, the bar will automatically lift without pressing any buttons, and at the same time the machine will print the make-up form. Your car has already been photographed, and the unpaid record is on file, so the bar will not keep you on the highway forever. You can pass without paying!