- It can be found in Balagog gro-Nolob's inventory after killing him during the Dark Brotherhood quest "Recipe for Disaster".
By order of his eminence, Emperor Titus Mede II.
"The possessor of this Writ of Passage - known throughout the Empire as the celebrated chef and author the "Gourmet" - is granted full and unrestricted access to any areas, information, or supplies necessary to fulfill the duty of the Emperor's personal cook."
After obtaining the Gourmet's Writ of Passage, if you speak to Balbus, he will offer you a unique piece of silverware named Balbus' Fork. Balbus can be somewhat difficult to locate, as he wanders around Skyrim with no set schedule. He also has a bad habit of getting himself killed by way of random encounters with critters, NPCs, dragons, and the like.