On certain dates of the year, visitors must pay an access fee of EUR 5-10 per person per day to enter Venice. Those with accommodation in Venice are exempt from paying this. Guests must however request an exemption voucher in advance and present it with an identity document on arrival. To check affected dates, fees and request an exemption, visit cda.ve.it/en/.
This is a big scam! Never received any communication with the host. We had to book somewhere else, but they took our money, more than 600 euros. And it is being so hard to get a refund. Scam, that's what it is.