25 Roubles Sberbank

Transnistria has issued commemorative roubles through its Republican Bank for decades, operating a fully independent monetary system unrecognized by any UN member state. The territory's currency exists in a legal grey zone — technically the Transnistrian rouble, backed by no international body and inconvertible outside the region, yet functioning as the sole legal tender within a strip of land between the Dniester River and the Ukrainian border.

Sberbank's presence in Transnistria is a direct remnant of Soviet financial infrastructure, the institution having maintained operations there through the post-1991 collapse when conventional banking arrangements dissolved elsewhere.