I really, really, really, REALLY want to say The Miz cashing in Money In The Bank but let's see how his title reign goes.
Other than that I'd say:
Steve Austin vs. Kane(c)-WWE Championship Monday Night Raw June 29, 1998
A one day title run
Kane was the biggest heel at this time and could have held it a good while. At least longer than a damn day! 
another is:
Chirs Jericho(c) vs. John Cena-WHC Championship Survivor Series 2008
I know Cena was returning on this day, but what even earned him this match? A broken neck? A new champion for no reason..
What's a match you feel the title shouldn't have changed hands?
Other than that I'd say:
Steve Austin vs. Kane(c)-WWE Championship Monday Night Raw June 29, 1998
A one day title run


another is:
Chirs Jericho(c) vs. John Cena-WHC Championship Survivor Series 2008
I know Cena was returning on this day, but what even earned him this match? A broken neck? A new champion for no reason..
What's a match you feel the title shouldn't have changed hands?