The requirements for documents needed at check-in depend on the type of accommodation and the applicable regulations. For hotels and other accommodation facilities, a Russian passport, an international passport, or a driver’s license may be accepted. For apartments, serviced apartments, and other properties where check-in or contract conclusion is carried out according to the rules of a specific property, the required documents are determined by the property itself. The flat must accommodate the number of people specified at the time of booking. It is possible to bring guests, but by appointment. Guests over the age of 23 are allowed to check into the accommodation facility in accordance with the agreement that is concluded upon check-in. Smoking is prohibited in the apartment (only on the balcony). If hidden circumstances are revealed, immediate eviction without refund is followed. For an additional fee, accounting documents are provided: a check with a QR code, non-cash payment for organizations. Video surveillance is conducted outside the apartment.