Civil Code, Art. 1518

The validity of the negotiation of a negotiable document of title is not impaired by the fact that the negotiation was a breach of duty on the part of the person making the negotiation, or by the fact that the owner of the document was deprived of the possession of the same by loss, theft, fraud, accident, mistake, duress, or conversion, if the person to whom the document was negotiated or a person to whom the document was subsequently negotiated paid value therefor in good faith without notice of the breach of duty, or loss, theft, fraud, accident, mistake, duress or conversion. (n)