Kernrechtsfrage
Whether A. validly filed a federal appeal without signature or power of attorney.
Extrahierter Entscheid
No valid appeal was filed for A., because Helsana could not represent her without a power of attorney once no KVG dispute existed.
Extrahierte Begründung
Statutory representation under Art. 89(3) KVG presupposes a dispute within Art. 89(1) KVG; since the case was not a KVG dispute, Helsana lacked authority to act for A.