The courier who frequently delivers you letters to start quest chains got killed outside of Riften by the guards. Not wanting to let a perfectly good dead body go to waste I decided to loot it, including his clothing. Apparently the courier re-spawned and now is not wearing any clothing when he delivers.
It is a little awkward when I am walking through a city and a naked man walks up to you and says
I have special package for you, your eyes only!
Is there any console command to re-spawn him to make him come back with his normal clothing?
UPDATE: Proof that it happened.
Also another note, reverse pickpocketing clothing did not fix it. In fact he had clothing in his inventory already that he chose not to equip.