Article 957

The legacy or devise shall be without effect:

(1) If the testator transforms the thing bequeathed in such a manner that it does not retain either the form or the denomination it had;

(2) If the testator by any title or for any cause alienates the thing bequeathed or any part thereof, it being understood that in the latter case the legacy or devise shall be without effect only with respect to the part thus alienated. If after the alienation the thing should again belong to the testator, even if it be by reason of nullity of the contract, the legacy or devise shall not thereafter be valid, unless the reacquisition shall have been effected by virtue of the exercise of the right of repurchase;

(3) If the thing bequeathed is totally lost during the lifetime of the testator, or after his death without the heir's fault. Nevertheless, the person obliged to pay the legacy or devise shall be liable for eviction if the thing bequeathed should not have been determinate as to its kind, in accordance with the provisions of article 928. (869a)