According to the legislation of the Russian Federation, when adult citizens check into a hotel, it is necessary to provide passports to each of them, regardless of whether they are settled in the same room or different. If you or your belongings are in the room for more than 10 minutes, the room fee will not be refunded!!!
For children, a birth certificate !
This requirement is specified in the Federal Law of the Russian Federation “On Tourism Activities” and is confirmed by the rules of accommodation in hotels and other similar accommodation facilities for citizens.