Key legal question
Whether the cantonal court correctly dismissed the appeal as time-barred.
Extracted holding
Yes. The appeal was filed after the non-extendable 30-day statutory deadline, and deemed service at the address provided by the appellant was valid.
Extracted reasoning
The administration had no reason to doubt the address repeatedly used by the appellant. He had to ensure delivery of expected procedural mail under the duty of good faith. No concrete indication of a postal error was shown, and he should have sought reinstatement of the deadline instead of merely contesting timeliness later.