Questione giuridica chiave
Whether the complaint against the cantonal supervisory decision was filed in time
Decisione estratta
The complaint was late because the appeal period had expired before it was lodged.
Motivazione estratta
An uncollected registered letter is deemed served on the seventh day after it reaches the destination post office if the recipient had to expect it. The cantonal court therefore correctly calculated the 10-day period from the postal pickup deadline and held the appeal to be late.