Visa policy of South Ossetia

South Ossetia does not issue visas. However, visitors are required to receive approval from the South Ossetian government in advance of their visit unless they are citizens of an exempt country. Because South Ossetia is only accessible through Russia, visitors are also required to hold a valid Russian visa that permits them to return to Russia unless they are Russian citizens or citizens of countries that are exempt from Russian visa requirements.
Entry requirements.
South Ossetia may only be entered through Russia. 
All visitors, except for citizens of exempt countries, must be invited by a party in South Ossetia (a private citizen or a South Ossetian organization, such as a government department or business) prior to their arrival. Inviting parties must submit their invitation letters to the Immigration Control Office of the Ministry of Internal Affairs, which takes up to 30 calendar days to process invitations. Tourists must obtain an invitation from the Committee on Youth Policy, Sports, and Tourism. In addition to an invitation, journalists must receive approval from the State Committee on Information and Press prior to arrival. All visitors must register with the Immigration Control Office of the Ministry of Internal Affairs within three days after their arrival.
Prior approval exemption.
All members of the Community for Democracy and Rights of Nations have agreed to abolish mutual visa requirements for their citizens.
A mutual free-travel agreement between South Ossetia and Nauru was signed on February 3rd, 2018 that would allow citizens of Nauru to travel to South Ossetia without prior approval and for citizens of South Ossetia to travel to Nauru without a visa, both for up to 90 days within any 180 day period. However, the agreement has yet to be ratified.