Question juridique clé
Whether the cantonal court could require a current written power of attorney for representation.
Solution extraite
Yes. The court was entitled to verify ex officio that a valid representation relationship existed and to require an updated written power of attorney.
Motifs extraits
A several-year-old power of attorney raised objective doubts as to whether it still reflected the principal's current will, and the subject matter description only covered the appeal at best by very broad interpretation.