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 arrange check-in, guests must contact the property in advance for check-in instructions. Contact details can be found on the booking confirmation. Upon check-in, guests must sign a rental agreement, the condition of which is: Persons under 25 years of age are not allowed to check in. If guests leave the apartment and leave the entrance doors open, they bear full financial responsibility for any damages caused by the entry of strangers.