General

§ 214 Evidence of Prior or Contemporaneous Agreements and Negotiations
§ 214 Evidence of Prior or Contemporaneous Agreements and Negotiations
§ 214 Evidence of Prior or Contemporaneous Agreements and Negotiations
§ 214 Evidence of Prior or Contemporaneous Agreements and Negotiations
Agreements and negotiations prior to or contemporaneous with the adoption of a writing are admissible in evidence to establish: 
(a) that the writing is or is not an integrated agreement;
(b) that the integrated agreement, if any, is completely or partially integrated;
(c) the meaning of the writing, whether or not integrated;
(d) illegality, fraud, duress, mistake, lack of consideration, or other invalidating cause;
(e) ground for granting or denying rescission, reformation, specific performance, or other remedy.

II. Invalidity of Transactions

Article 166. Contested and Null Transactions
Article 166. Contested and Null Transactions

  1. A transaction shall be invalid on the grounds established by this Code, or by virtue of being deemed as such by a court (contested transaction), or irrespective of such deeming (null transaction).
  2. A claim to deem a contested transaction to be invalid may be brought by the persons specified in this Code.

A claim to apply consequences of the invalidity of a null transaction may be presented by any interested person. The court shall have the right to apply such consequences at its own initiative.