Kernrechtsfrage
Whether the disability pension could be withdrawn retroactively because the insured allegedly breached the duty to report a return to work.
Extrahierter Entscheid
The file did not yet allow a final finding on a durable resumption of gainful activity; the cantonal court had to take further evidence before deciding whether a reporting breach justified retroactive withdrawal.
Extrahierte Begründung
The notice sent to the insured contained only brief, incomplete excerpts from inspection reports. These were insufficient to establish with preponderant probability a durable return to work, but they created enough doubt to require further investigation under the inquisitorial principle. The cantonal court could not shift the burden of missing proof to the AI office without first completing the facts.