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 deposit is set individually depending on various factors and is returned after checking the apartment and complying with the rules. The guest fills out an electronic contract before checking in. The contract is sent on the day of check-in. The contract is filled out via the online service. When checking in a minor child without parents, a handwritten power of attorney from the legal representative is required. After each check-out, cleaning is carried out, plumbing and electrical equipment are checked. Smoking is prohibited in the apartment.