Kernrechtsfrage
Whether the appeal had to be admitted despite non-payment of the advance on costs.
Extrahierter Entscheid
No. Because the appellants did not pay the required advance within the additional deadline, the court could not enter into the appeal.
Extrahierte Begründung
Under Art. 98 and 101(3) CPC, failure to pay the requested advance after an initial default allows the court to refuse to hear the matter. The appellants could not be reached at the address they had provided, so granting another deadline would have been pointless.