P.R. Laws tit. 31, § 3982
2019-02-20 00:00:00+00
If one of the contracting parties should have received the thing promised to him in exchange, and should prove that it did not belong to the person who gave it, he cannot be forced to deliver the one he offered in exchange, and he shall perform by returning the one he received.
History —Civil Code, 1930, § 1429.