Kernrechtsfrage
Whether the debtor proved or at least made it plausible that it timely filed opposition to the payment order.
Extrahierter Entscheid
To the extent the complaint challenged the assessment of evidence, it was inadmissible; the federal court could not review the cantonal authority's factual evaluation in this procedure.
Extrahierte Begründung
A complaint under Art. 19 SchKG may only allege violation of federal law. Review of evidence is available only via public-law appeal for arbitrariness. The appellant's argument that it had proved or rendered plausible opposition was therefore directed at evidence appraisal and could not be heard.