1. Any entitlement claim (rei vindicatio) concerning the subject matter of the sale brought before its delivery shall be directed against both the seller and the purchaser. 2. If an entitlement claim concerning all or part of the thing is brought against the purchaser after delivery, the purchaser shall notify the seller thereof, and the seller shall intervene in the proceedings in support of the purchaser or substitute themselves for the purchaser therein. 3. If the seller is notified in due time and fails to intervene in the claim, they shall be liable under the warranty, unless they prove that the judgment resulted from fraud or gross fault on the part of the purchaser. 4. If the purchaser fails to notify the seller of the claim in due time, and a final judgment having the force of res judicata is rendered against them, the purchaser's right to invoke the warranty shall lapse if the seller proves that their intervention would have led to the dismissal of the claim.
Interpretation and application must be checked against the official text and current version.