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. There can't be more guests than the number stated in the reservation. Smoking is prohibited in the flat and on the balcony. A short-term rental agreement is entered into upon booking.