Thank you for your kindness. I want to tell Douglas why we asked their passports: The Italian Law requires that hotels, B & B, guest houses, holiday homes, should notify the police headquarters, the passport numbers of their guests within 24 hours (art.109 T.U.L.P.S., 2013). This standard is the same on the whole Italian territory. Of course I deleted their personal data as soon as I notified the police headquarters in Asti their passport numbers. To me it seemed appropriate to clarify this detail that can be useful to other guests.