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. Pets are allowed for an additional fee. The cost must be confirmed with the property, and the breed and type of pet require approval. The deposit may be increased by RUB 2000.00 when staying with pets.