1. If the entitlement is established on the basis of the purchaser's admission or their refusal to take an oath, they may not have recourse against the seller. 2. The purchaser may have recourse against the seller under the warranty, even if entitlement is established by their admission or refusal to take an oath, provided that the purchaser acted in good faith and had notified the seller of the entitlement claim in due time and invited them to join the proceedings, and the seller failed to do so, unless they prove that the entitled party was not justified in their claim.
Interpretation and application must be checked against the official text and current version.