Kommentar zu Jirmejahu 32:11

the deed of the purchase The deed of the sale.

that which was signed, etc. With its signature as it was signed according so the law and the statute.

and that which was open Which was confirmed in the court by word of its witnesses, and the judges wrote and signed a judicial confirmation. This is the confirmation of the deeds to make the matter open and publicized lest the witnesses die, and our Rabbis explained this concerning a plain, open document and a folded one in Baba Bathra (160b).