Thank you for the reply. I am aware about the fact that upon booking whether Airbnb or through booking it is mandatory to submit your identification details together with that of your companion during your stay. What happened last night, where a carabinieri (take note that they weren’t local police officers) came knocking on our door to ask about my document was totally off! Today I talked with a relative who’s a police officer about what happened and his hypothesis is that it could be that the carabinieri were tipped off (?). My question is that, is it legal without a warrant or written consent from the judge to come knocking in a home where you host visitors? If by chance there were some problems with the documents/indentification cards submitted to the questura by this proprietaria, wasn’t more proper for the carabinieri to address the issue with them and not to wait for the visitors to arrive and then control them afterwards? In the first place, the carabinieri should have advised the hotels or property owners to refuse entrance of visitors with documents in question. I think that was more logical.