Kernrechtsfrage
Whether the appeal against the cantonal non-entry decision on security for party costs was admissible.
Extrahierter Entscheid
The appeal was inadmissible because the challenged interim decision could cause only a purely factual financial disadvantage, not a non-remediable legal prejudice.
Extrahierte Begründung
For a self-standing interim decision, admissibility under Art. 93(1)(a) BGG requires irreparable legal harm. The defendant's concern that any later cost award might be uncollectible is merely factual; the main action continues unaffected.