RTÉ has spent almost €500,000 on reports examining the payments controversy and Toy Show the Musical.
Documents provided to the Public Accounts Committee show a total of €493,291.69 was spent on the three Grant Thornton reports.
The third Grant Thornton report, examining expenditure on Toy Show the Musical, is ongoing.
Costs associated with this report are accrued on a per hour basis, so the amount spent so far will likely rise.
A separate review into RTÉ's voluntary exit schemes, which is being conducted by McCann Fitzgerald, is also still under way and so costs are not available at this time.
Sinn Féin TD and chairperson of PAC Brian Stanley welcomed the documents presented to the committee.
However, he said there was one key document missing, which details a meeting on 7 May 2020 between NK Management, then-director general Dee Forbes and RTÉ's legal team.
He said this was particularly important as Ms Forbes has not appeared before the committee.
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Mr Stanley told RTÉ's Morning Ireland: "She was unable to attend, she has certified that medically and that's where that matter rests.
"If that changes we would welcome it, I would welcome her attendance at any time. But in the absence of Dee Forbes we don't have an RTÉ account of what exactly happened at that meeting."
He added that some RTÉ senior management, some of which have now been moved, did claim during the summer that the note was legally privileged, and then moved to a position where it was a matter of client confidentiality, based on solicitor advice.
However, Mr Stanley said that the problem with this was that there was a third party present in negotiations, and the only people governed by client confidentiality is the solicitor who worked for a public body.
He explained that the committee has sought to sanction the houses of the Oireachtas to compel this note, and he was hopeful this would be rubber stamped within a week or so.
The Sinn Féin TD said: "We will be pursuing this and the committee are at one on this. We need to see this document.
"If RTÉ want to block that, RTÉ will have to go through the courts ... that will not be a pretty sight. RTÉ using taxpayers' money going over to the Four Courts ... and if anybody from the Oireachtas is forced to go over and contest the case using public money, that will not be pretty."
He said that the committee was using proper procedures and would pursue this using every power it has, and that he hoped to have reply back from the procedures, privileges and oversight group to push ahead as the committee was now at report stage of its findings.
He added that the detailed report would provide concise and clear recommendations, that would be strong.
Mr Stanley added: "Legal advice is one thing and autonomy is a completely different thing. And it may be a mixture of both ... nobody else knows except people who were at that meeting ... the people who are overseeing proper expenditure of public funds by a public broadcaster."
"We do welcome some of the changes that have been made and we can see some of those coming through," he said, praising the new team under current Director General Kevin Bakhurst.
Figures show TV licence sales below last year
New figures show the number of people buying TV licences is continuing to be significantly lower than a year ago.
A number of steps have been taken by RTÉ to regain the trust of the public following a series of controversies in the aftermath of revelations over misstated payments to Ryan Tubridy.
These steps have included changes to senior management in the organisation, a commitment to increase transparency and ensure a high standard of corporate governance.
Figures released to RTÉ's Morning Ireland from the Department of Media show that these steps have yet to change the outlook of TV licence fee intake.
In the first three weeks of October, 34,882 TV licences were taken out. A decrease of 37% compared to 55,704 in the same period last year.
In September, 45,440 TV licences were purchased compared with 66,281 in September 2022. A decrease of 31%.
For the period between July to the third week of October 2023, 161,237 TV licences were sold versus 245,146 for the same period last year- a drop of 83,909 or 34%.
Additional reporting Kieran Dineen
