Certificate of Free Sale.....when it is used and who supplies it. This information is taken from "A Basic Guide to Exporting" provided by the U.S. Commercial Service to assist U.S. companies in exporting.
Last Published: 10/20/2016

Required in some countries for certain kinds of goods. Your state government usually supplies this document, which indicates that the goods you intend to export have been sold in that state.

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Certificate of Free Sale