Kernrechtsfrage
Whether the interim order requesting a court cost advance was deemed served despite non-collection of the registered mail.
Extrahierter Entscheid
Yes. Service was deemed to occur seven days after the first unsuccessful delivery attempt, regardless of the postal pickup period.
Extrahierte Begründung
The recipient must expect official correspondence during the pending proceedings and take precautions. The legal fiction of service under Art. 38(2bis) LPGA is not altered by a longer postal collection period.