The NY Daily News has published what it claims are details from the contract contestants must sign before competing on The Voice.
Change the rules at any time.
Eliminate contestants at any time, even if they are “winning” with the public.
Ignore the show’s voting system, which includes sales figures for contestants’ songs on iTunes, in the event of problems.
Force contestants to undergo medical or psychological testing and, under certain circumstances, release the results on TV.
Photo source: By Lestat, via Wikimedia Commons