According to a euro-skeptic British source, until the 1960s, the UEF was financed in part by the American Committee for a United Europe (ACUE), which was directed by the Office of Strategic Services (OSS), the former U.S. Secret Service .
Nach einer euroskeptischen britischen Quelle wurde die UEF bis in die 1960er Jahre zum Teil über das American Committee for a United Europe (ACUE) finanziert, welches vom US-Geheimdienst Office of Strategic Services (OSS) gelenkt worden war.