On the day of my arrival, the keyholder didn't answer the phone and in the email I had written previously he hadn't specified that I could collect the keys from the box displayed outside. I called Interhome customer service and on a Sunday there was no one there who spoke Italian, only English, which I honestly understand very little, but I managed to understand that the keys were in the box.... it was enough for the keyholder to write to me in the email what I had to do...