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. To check in, it is necessary to contact the administration of the accommodation in advance by phone in order to leave guests contact number for instructions on check-in. Contact information is provided on the booking confirmation. Guests over 23 years of age are allowed to check into the accommodation facility in accordance with the agreement concluded upon check-in.