The Documents are an unobtainable item added to the cache alongside The Fremennik Isles. They have an option to "Open", while their examine states they must be taken to Ali Morrisane in Al Kharid.
The documents' internal name suggest they formed part of a trade agreement, while the Royal decree is referred to as a "receipt", despite not serving this purpose. At the same time, many unused models can be found depicting crates of armour, swords, and battleaxes. It is possible therefore that there was a cut subplot in the quest which involved trading Jatiszo products with Ali Morrisane.