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 apartments are located on the 3rd or 4th floors in a building without an elevator. Before checking in, guests should contact the accommodation by using the phone number indicated on the voucher.