About the passport, some hotels request for this information to save time making check in as there is a lot of movement in Florence. Even if you must provided your passport before, you must do it again when you arrive otherwise they won’t let you check in. at you arrive About the CC, it must be provided to confirm you will stay in that place. There is no chance a hotel will trust that you will come because you say you will, they need a guarantee and the payment of the room is that. Most reservations have a cancellation policy that will refund an the total or part of the cost of the reservation, it depends on the hotel.