This question already has an answer here:
I'll be traveling to Italy with my family next year for 15 days (We're Brazilians) and we will be staying on apartments rented with Airbnb. I heard immigration will ask for proof that I'm staying in a Hotel or an invitation letter.
Is the Airbnb booking valid as proof of stay?
[EDIT] My question differs from this one because I'll be staying only 15 days.