Question juridique clé
Whether the pension fund was bound by the IV office's finding on the onset of incapacity despite not being formally notified of the IV decision.
Solution extraite
The IV determination was not binding by reason of informal third-party notice alone, but the cantonal court was still correct to review the onset only for obvious error.
Motifs extraits
Binding force requires the pension fund's participation in the IV proceedings and proper service of the pension decision, unless the pension scheme expressly adopts the same invalidity concept. A later informal awareness does not by itself cure the service defect or create a duty that would make the IV finding binding in the ordinary sense.