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. Before check-in, guests must fill out an online agreement. A security deposit is required, which will be refunded within 24 hours after the guest's departure. Guests must provide advance notice of where to transfer the deposit. If this information is not provided, the refund will be made to the contact phone number linked to the bank account. Smoking is prohibited in the apartment. If the smell of tobacco smoke is detected, or if the terms of stay are violated, the deposit will not be refunded.