In April this year, Corley went on GMTV to apologise for the fact that GMTV had defrauded viewers responding to a phone-in quiz, and promised to reimburse those who were affected. He also sacked GMTV's provider, Opera Telecom.
However, today he has said he will be leaving, as part of moves by GMTV to help restore trust in the company.
Corley said: "We would like to apologise unreservedly again for the occurrence of these errors.
"It is important that people take responsibility when mistakes are made that threaten the trust of our viewers."
Other remedies will include 250 free prize draws for entrants who were defrauded, with £10,000 for each draw offered as a prize. It will also donate £250,000 to the children's charity Childline.
GMTV has also committed to regular inspection of phone-in competitions and the firms who provide them.
Corley has worked on a huge number of shows including the first two series of 'The Tube', with Jools Holland and Paula Yates; ITV's coverage of the 1997 general election; 'Police Camera Action'; and 'Neighbours from Hell'.
In a hint of what was to come yesterday, ITV chairman Michael Grade told MPs that he does not expect the broadcaster to escape criticism when a government committee reports back on public confidence in broadcasting, following the recent scandals.
Grade made the comments as he appeared before the House of Commons Culture, Media and Sport select committee, giving evidence at a one-off session that had been called because of public concerns about widespread, systemic problems in the way that broadcasters, including the BBC, ITV, Five and Channel 4, have used premium rate telephone services in their programmes.
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