Is it illegal for a hotel not to check out?

This is illegal. According to the laws of our country, when consumers check in at a hotel, the hotel should provide room facilities and articles. Comply with the contract, and shall provide services to consumers in accordance with the contract. If the hotel fails to provide services as agreed in the contract, or fails to inform consumers in advance, consumers cannot use room facilities and supplies. Consumers have the right to claim compensation from the hotel. If the hotel refuses to check out, consumers can complain to the relevant departments or safeguard their legitimate rights and interests through legal channels.