The X Factor will not face any further action after a contestant swore on the show before the watershed, Ofcom has said.
Six complaints were made about the live October episode, in which a competitor said "I f****** told you" after finding out a fellow act had progressed to the next round of the contest.
But the watchdog said it considered the matter resolved after ITV quickly made a public apology.
A spokesman said: "We took into consideration the emotionally charged nature of this live programme, the prompt on-air apology, and the fact ITV had measures in place to minimise the risk of offensive language being broadcast.
"As a result we considered this investigation resolved."
The regulator also chose to drop 79 complaints about mistreatment of animals throughout the channel's jungle competition series I'm A Celebrity... Get Me Out Of Here!
It announced it would not be launching an investigation into concerns that contestants ate live animals as part of their tasks.
"We found these were in keeping with the format of this reality series," the spokesman said, "and were unlikely to have exceeded the expectations of the audience."
Following a separate investigation into scenes of a multiple car accident shown pre-watershed during an Emmerdale episode, Ofcom concluded that the channel was not in breach.
After looking into 14 complaints over the October episode, the spokesman said: "We found that, although the material had the potential to cause offence, the violence was suitably limited and justified by the context."