Nauru is now representing the interests of Georgian break-away republic South Ossetia at the United Nations as well as in other international organisations, the South Ossetian leader says.
In comments reported by South Ossetia's government information service, President Anatoly Bibilov said because an active foreign policy was his administration's priority, Nauru's support was worth a lot.
Nauru is the only Pacific country to recognise South Ossetia as an independent country while Georgia considers it as territory occupied by Russian troops.
As a consequence of Nauru's stance, it was no longer eligible for any US government financial help.
A year ago, the US adopted an act that also prohibited US representatives in international financial institutions from supporting programmes that violate Georgia's territorial integrity and sovereignty.
While pursuing his own foreign policy, Mr Bibilov said he wanted South Ossetia to become part of Russia.