Kernrechtsfrage
Whether the appellate court violated the right to be heard by refusing to examine arguments against the finding of mutwilfulness as a basis for costs.
Extrahierter Entscheid
Yes. Even without standing to challenge the merits, the complainant had to be heard on arguments directed specifically against the cost order, including whether the complaint was vexatious.
Extrahierte Begründung
The appellate court read the prior case law too broadly. A party lacking standing on the merits may still contest a cost order on grounds other than a mere request to overturn the substantive decision. Since mutwilfulness is a legal concept and not identical with the substantive outcome, objections to that characterization must be heard if they are aimed only at the cost issue.