Duplicate receipts must be so marked.
Section 6
SEC. 6. Duplicate receipts must be so marked.—When more than Duplicate receipts, one negotiable receipt is issued for the same goods, the word "duplicate" shall be plainly placed upon the face of every such receipt, except the one first issued. A warehouseman shall be liable for all damage caused by his failure so to do to any one who purchased the subsequent receipt for value supposing it to be an original, even though the purchase be after the delivery of the goods by the warehouseman to the holder of the original receipt.