Quest Items (Oblivion)

Quest items are items that have a certain importance to a quest the player is on, such as a key to a certain dungeon the player needs to visit, or an artifact the player is to use once inside, or give to someone once he or she returns. Quest items cannot be dropped, sold, or otherwise removed from the player's inventory without using the PC version's console. Most quest items are either automatically removed or have their quest item status revoked (and thus become capable of being dropped or sold) upon completion of the quest to which they pertain. However, the removal process is bugged in certain cases, making the player stuck with the item.

Below is a table of known quest items that do not go away upon completion of their quests, which quests (if any) they are needed for, and their item ID. If you are playing the PC version, these items may be destroyed by hitting the ` key to access the console, then typing player.RemoveItem [Item ID] 1. Make sure you do not destroy them before their relevant quests are completed! If you are overzealous and got rid of the item too soon, or need or want it back for any reason, type player.AddItem [Item ID] 1 in the console.

Other items worth mentioning:
 * The Blade of Woe you receive from Dark Brotherhood: A Knife in the Dark does not appear on this list, because it actually is taken care of, though much later than the immediate aftermath of the A Knife in the Dark quest. Upon completing Dark Brotherhood: Honor Thy Mother, it recives several enchantments and loses its quest item status, essentially becoming a long-delayed reward.
 * The Mage's Guild Key you get upon starting Mage's Guild: Join the Mage's Guild is considered a quest item and cannot be removed, however, it does have its uses. (It unlocks the doors to all the private areas and living quarters in every local Mage's Guild hall.)  It may become redundant with the Arch-Mage's Key you get from Mage's Guild: Confront the King.  If this is true, then the Mage's Guild Key would become an obsolete but undroppable quest item at this point, and should thus be added to the table.  This needs further research and confirmation.