What is the judicial standard for distinguishing between financial documents related to different disputes to ensure against double recovery?

The judicial authority undertakes to verify the nature of each claim individually and to distinguish between different disputes, such as supply claims and claims for the performance of works. It must ensure that the financial documents or amounts paid relied upon by one of the parties pertain to the obligation subject to the current dispute and are not related to other contracts or obligations, in order to prevent unjust enrichment.