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 bathroom is outside the apartment, the next door is nearby. It belongs only to this apartment and is locked with a key. Accommodation with animals requires prior approval of the type of pet and the amount of surcharge. Unauthorized accommodation entails fines.