Kernrechtsfrage
Whether the cantonal court correctly held the complaint against the disability decision to be time-barred.
Extrahierter Entscheid
No. The service date of the unregistered decision was not established with sufficient probability, and the filing of 12 December 2006 had to be treated as a timely complaint to an incompetent authority.
Extrahierte Begründung
The administration bore the burden of proving service. For unregistered mail, the usual postal course is insufficient to prove delivery. On the record, receipt could not be excluded only on 13 November 2006 or later, so the 30-day period was not shown to have expired.