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. All guests are subject to mandatory registration. Its price depends on citizenship, length of stay, reasons for staying in Russia and other factors. You can find out the registration fee at the reception on check-in.