Key legal question
Whether the appellant proved that he entrusted funds to the respondent under a management relationship requiring restitution.
Extracted holding
No; the appellant did not prove that he transferred funds to the respondent in circumstances creating a duty to return them.
Extracted reasoning
Under Art. 8 CC, the claimant bore the burden of proving the decisive facts. The cantonal court's assessment of the evidence was not arbitrary: the alleged contract, the account structure, the supporting witnesses, and the document of 15 October 2001 were all doubtful or contradicted by the record.