'Signed' in the Bible

Then on the thirteenth day of the first month, the king's scribes were sent for, and they put in writing Haman's orders to all the king's captains and the rulers of every division of his kingdom and the chiefs of every people: for every division of the kingdom in the writing commonly used there, and to every people in the language which was theirs; it was signed in the name of King Ahasuerus and stamped with the king's ring.

So now send a letter about the Jews, writing whatever seems good to you, in the king's name, and stamping it with the king's ring: for a writing signed in the king's name and stamped with the king's ring may not be changed.