Kernrechtsfrage
Whether the revision request was validly filed on behalf of K.________ despite the revoked power of attorney.
Extrahierter Entscheid
The request could not be treated as properly filed for K.________ because counsel lacked authority after the mandate was revoked; no grace period for producing a power of attorney was warranted.
Extrahierte Begründung
Counsel knew of the revocation, could not rely on a substitute mandate after the original authorization ended, and did not show that the client confirmed the appeal; the request was therefore filed without valid authorization.