Sarov is a closed city. Entrance to the city is carried out only with passes. 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. According to the Government Decree No. 1853 of 11/18/2020 (clause 18), Minors under the age of 14 are required to check in the hotel with the documents of their parents (adoptive parents, guardians). If the accompanying persons are not legal guardians, they are required to provide the notarized consent form of the legal guardians (one of them) and the birth certificate of the minors. Minors aged 14 or above, in the absence of legal representatives next to them, are required to check in the hotel with his/her identity document and a notarized consent form from the legal guardian (one of them).