Kernrechtsfrage
Whether the debt enforcement was void for manifest abuse of rights under Art. 2 para. 2 CC
Extrahierter Entscheid
The enforcement was abusive only in exceptional cases, but here the exorbitant amount, lack of substantiation, and context showed that the creditor pursued objectives unrelated to enforcement and aimed to harass the debtor.
Extrahierte Begründung
The creditor gave no plausible legal relationship supporting a personal CHF 300 million claim, despite having the opportunity to do so. The timing after criminal and civil proceedings against him reinforced the inference of a retaliatory, harassing purpose.