13 GCA § 7402: Duplicate Receipt or Bill; Overissue.

Neither a duplicate nor any other document of title purporting to cover goods already represented by an outstanding document of the same issuer confers any right in the goods, except as provided in the case of bills in a set, overissue of documents for fungible goods and substitutes for lost, stolen or destroyed documents. But the issuer is liable for damages caused by his overissue or failure to identify a duplicate document as such by conspicuous notation on its face.