Kernrechtsfrage
Whether the cantonal court could treat the court advance as late based only on the booking date and dismiss the appeal without asking for proof of timely debit.
Extrahierter Entscheid
No. For bank payments, timeliness depends on the valuation date of debit from the payer's Swiss bank account; the court had to allow proof of timely payment.
Extrahierte Begründung
Art. 143(3) ZPO is decisive. A court cannot infer lateness from the credit date alone. If the advance reaches the court after the deadline, and no prior proof request was made, the court must inquire into the debit date. Otherwise, it violates good faith and Art. 143(3) ZPO.