1. If several debts, of the same kind, are owed by the debtor to a single creditor, and the amount paid is insufficient to discharge them all, the debtor may, at the time of performance, designate the debt they intend to discharge, unless prevented by law or agreement. 2. If the debt is not designated in the manner set out in Paragraph (1) of this Article, payment shall be applied to the debt that has fallen due. If several debts have fallen due, it shall be applied to the debt most onerous to the debtor. If the debts are equally onerous, payment shall be applied to the debt designated by the creditor.
Interpretation and application must be checked against the official text and current version.