Article 483 of Civil Code

1 - If an action is brought against the buyer claiming title to the thing sold in whole or in part, he must promptly join the seller in it. Home Page 1006 Index of the Law Civil Code Decree-Law No. 67 of 1980 AD Promulgating the Civil Code 2 - If he does not join him and a final judgment is issued in favor of the third party, the seller's warranty obligation shall lapse if he proves that joining him in the action claiming title would have led to its dismissal.