Earlier we reported that an one time use code would be needed for Elder Scrolls Online. This was reported on Gameradar and various other media outlets.
Over the course of the day Elder Scrolls developet Zenimax Studios has stated that the game disc is enough. There won't be any one time code just a game disc. This means you can trade it in without a fuss. Also, it means you don't need ti worry if you uninstall the game or change consoles.