Key legal question
Whether the CHF 100,000 payment by X. AG extinguished A.'s remaining debt to B. through payment or set-off.
Extracted holding
The payment could not be treated as A.'s debt payment, and set-off was unavailable because identity between A. and X. AG was not proven.
Extracted reasoning
The federal court was bound by the cantonal findings that X. AG recorded the transfer as a loan to B., not as a loan to A. The set-off argument depended on an unproven identity between A. and the company, which was a factual challenge inadmissible in reform proceedings.