The Dáil's ethics watchdog has decided that it is outside its remit to consider a complaint made against former Fine Gael TD Dara Murphy on the basis that he is no longer a member of the Oireachtas.
Fianna Fáil whip Michael Moynihan had raised concerns over Mr Murphy's Dáil attendance record and related expense claims.
The complaint related to the fact that Mr Murphy was a TD for Cork North Central while also regularly working in Brussels with the European People's Party - the political block that Fine Gael is aligned with.
Earlier this month, he resigned his seat as TD for Cork North Central to take up a new role in the European Commission.
He tendered his letter of resignation to Leas-Cheann Comhairle Pat the Cope Gallagher minutes after supporting Minister for Housing Eoghan Murphy in a vote of no confidence.
Today's Committee on Members' Interests meeting began by continuing with its separate investigation into Fianna Fáil TDs accused of voting for colleagues who were outside of the chamber.
The committee recommended that the Dáil issue Fianna Fáil TD Lisa Chambers with a warning, after she accidentally voted for a colleague but did not inform the authorities.
Ms Chambers has already apologised to the Dáil for her actions, saying it was an accident, but also accepting she should have informed the Dáil staff after it happened.
The committee also decided against taking action against Fianna Fáil's Barry Cowen in relation to voting irregularities.
The investigation into two other Fianna Fail TDs - Timmy Dooley and Niall Collins - is ongoing.
The next hearing into the matter is not expected until the New Year.
The complaint had come from Fine Gael TD Noel Rock, as well as a member of the public, about voting irregularities by Fianna Fáil TDs in the Dáil chamber.
The complaints were lodged after it emerged that Mr Collins voted six times for his colleague Mr Dooley who had left the Dáil chamber.
All four TDs subsequently apologised to the Dáil for their behaviour.