2637. Where the parties have made a transaction on all matters between them, the subsequent discovery of documents of which they were unaware at the time of the transaction does not constitute a cause for annulling the transaction, unless the documents were withheld by one of the parties or, to his knowledge, by a third person.
However, the transaction is null if it relates to only one subject and if the documents later discovered prove that one of the parties had no rights in it.
1991, c. 64, a. 2637; I.N. 2015-11-01.