The Second World War interrupted the activities of UIPFB but in 1948 the association was re-introduced. Thirty years later, the Union was renamed “Union Internationale de la Propriété Immobilière” – UIPI.
The fall of the communist regimes in Central and Eastern Europe, and shortly after in the Balkans, brought in and back to UIPI associations of property owners from these countries, fighting for the restitution of their confiscated properties. UIPI supported their action, keeping the matter politically open until today.