The Municipality of Venice has introduced a new tourist tax which will apply to day-trippers. Those who are spending a night or more in Venice will be exempt from the fee but will have to register their stay online on this website: cda.ve.it/en/
Here is the procedure to get the exemption:
After that you will receive a voucher with a QR code to show to authorities at the city’s main access points if you are asked.
This registration will be necessary on these red days marked on the calendar:
Register even if your departure falls on one of these days because your exemption will be valid until midnight of the departure day.
Important: you are not exempt from the payment of the city tax of €3.50 per person per night. The above-mentioned fee, however, concerns access to Venice and guests staying in an accommodation facility are exempt after registration.