My friend who stayed at the hotel took my money. Can I check his ID information at the hotel?

You can't. According to the provisions of Article 6 of the Measures for the Administration of Public Security in Hotel Industry, it is known that hotels must register when receiving passengers' accommodation, and check the identity documents of passengers when registering, but it involves citizens' privacy. Individuals are not allowed to inquire about other people's hotel information privately, unless they call the police, the police involved will collect citizen information. The basic definition of a hotel is a business organization that provides users with a safe and comfortable space for a short rest or sleep.