Key legal question
Whether the advance payment of CHF 34,789.35 had to be allocated to the claimant's claim for windows for the appellant's chantier.
Extracted holding
No. The appellant did not prove any agreement or declaration assigning the payment specifically to that chantier, so the ordinary order of imputation applied.
Extracted reasoning
The cantonal court's factual findings were not shown to be arbitrary; without a declaration by debtor or creditor, Art. 86 CO did not apply and Art. 87 CO governed.