Kernrechtsfrage
Whether the cantonal appeal court violated the appellant's rights by treating the appeal as lapsed after non-payment of the court advance despite a request to extend the deadline.
Extrahierter Entscheid
No. The complaint was limited to an unsubstantiated reliance-protection argument and did not show a protected reliance basis after the reminder of 7 April 2009.
Extrahierte Begründung
The Federal Supreme Court held that an appellant must specify which rights were violated. It does not review constitutional rights ex officio. The appellant's own filing showed that, after receiving the second reminder, he had to know his extension request had not been granted and could not reasonably rely on a self-assumed extension without asking the court.