ITV News' Political Correspondent Claire Stewart reports:
Ms Adams, who announced last month she was leaving the BBC, initially told MPs she had not seen a note detailing plans for payoffs to deputy director general Mark Byford and marketing boss Sharon Baylay.
However, the under-fire HR boss has since admitted that she was involving in writing the memo. She said in a written statement released today:
Her remarks came after former director general Mark Thompson accused BBC Trust boss Lord Patten and trustee Anthony Fry of "fundamentally misleading" members of a parliamentary committee.
Mr Thompson, who left the BBC to become chief executive at the New York Times, made the attack on his former colleagues in a written statement submitted to the Public Accounts Committee ahead of a hearing on Monday.
The Trust is the BBC's governing body and was set up to act in the best interests of the licence fee payers.
Mr Thompson's written evidence describes Lord Patten and Mr Fry's committee appearance as containing "important inaccuracies" and being "fundamentally misleading".
Speaking today, Lord Patten said he was "looking forward" to coming back before the committee and had "no concerns" about what Mr Thompson has said.
Ms Adams is due before the committee on Monday alongside Lord Patten, his predecessor Sir Michael Lyons, the former chairman of the BBC Executive Board Remuneration Committee Marcus Agius, Mr Thompson and Mr Fry.
Mr Thompson has said tonight: "The first questions I want to answer are ones from the MPs and to put Parliament first".
Mr Thompson said he had "made a submission" to the Public Accounts Committee and did not want to make any public statements ahead of his appearance before MPs on Monday.