Published Thursday, 15 November 2012
Phillip Schofield, host of ITV's This Morning. (© ITV)
In a statement issued by ITV on Thursday, the broadcaster confirmed that its investigation into the incident - which happened a week ago - had now concluded.
"The appropriate disciplinary action has been taken," the statement read.
"We sincerely apologise because the way in which the issue was raised was clearly wrong and should have been handled differently.
"We have taken steps to make sure our editorial processes are always properly followed, which was not the case in this instance, and to ensure such an error will not be made again."
It is understood Schofield, who has already had an apology read out on air, and a number of the This Morning production team were subject to the disciplinary action.
The incident arose following weeks of media coverage on the issue of historical child abuse, as investigations into the extent of the Jimmy Savile scandal continue.
A number of names have appeared online in allegations linking them to child abuse.
Phillip Schofield told the Prime Minister during the This Morning interview that just a few minutes research on the Internet had turned up the names of several Conservative Party members.
He then passed a card with the names listed on it to David Cameron, with the names visible to the audience at one point - which Schofield later said was due to a "misjudged camera angle".
In his apology the next day, the presenter said he would "never be part of any kind of witch hunt".
Schofield added: "I asked for his (David Cameron's) reaction to give him the opportunity to make a point which he very clearly made about the dangers of any witch hunt."
This Morning was reported to Ofcom over the incident by Conservative MP Rob Wilson.
He also reported BBC Newsnight for its programme which made a number of false allegations against Tory peer Lord McAlpine - who will receive a payment of £185,000 after a settlement was reached.
Ofcom has confirmed that it has launched investigations into both This Morning and Newsnight.
The media watchdog will look at standards at ITV and the BBC and whether there was unfair treatment of any individuals or any infringement of privacy.
Ofcom's response to the complaint by Rob Wilson has been published on its website and also addresses his concern about a "loophole" regarding social media and innuendo.
"We believe that Ofcom is able to investigate and properly address the issues raised by the broadcast of these programmes and the resulting speculation on social media and do not consider that there is a potential loophole of the manner you describe," the response said.
It is understood the investigation will take up to 90 days.