The Auditor-General responded to, and then followed-up, correspondence from the Hon. Tony Burke MP dated 25 July 2017, requesting that the Auditor-General conduct an investigation into allegations arising out of a recent Four Corners program concerning the Murray-Darling Basin.

The Auditor-General responded on Thursday 27 February 2020 to correspondence from senators Janet Rice and Larissa Waters dated 7 February 2020, requesting that the Auditor-General investigate the decision-making process under the Community Sport Infrastructure — female facilities and water safety program, and the conduct of any relevant parties in relation to this matter. The Auditor-General provided a follow-up response to senators Rice and Waters on 24 July 2020. 

The Auditor-General responded on 19 April 2017, and followed-up on 19 July 2017 and 18 May 2018, to correspondence from the Hon. Wayne Swan MP dated 27 March 2017, requesting that the Auditor-General conduct an investigation to examine the operation of the Northern Australia Infrastructure Facility (NAIF), its independence and the quality of the systems and analyses being implemented.

The Auditor-General responded on 14 December 2016, and followed-up on 19 July 2017, to correspondence from Senator Kakoschke-Moore on 14 November 2016 requesting that the Auditor-General conduct an audit of the National Affordable Housing Agreement (NAHA).

The audit reviewed six budget-funded agencies (Australian Customs Service, Australian Taxation Office, Centrelink, Department of Defence, Department of Education, Training and Youth Affairs, and Department of Immigration and Multicultural Affairs) and two off-budget entities (Airservices Australia and Reserve Bank of Australia). The ANAO also examined the Office for Government Online's (OGO, formerly the Office of Government Information Technology, or OGIT) whole-of-government coordination of the Commonwealth's Year 2000 efforts.

The Auditor-General (A/g) responded on 24 September 2015 to correspondence from Senator Glenn Lazarus on 10 September 2015 regarding National Stronger Regions Fund.

The Auditor-General responded on Thursday 27 February 2020 to correspondence from Senator Sarah Hanson-Young dated 16 February 2020, requesting that the Auditor-General conduct an investigation to examine the eligibility guidelines and administration of grant funding arrangements set out under both the Environment Restoration Fund and Communities Environment Program, and the conduct of any relevant parties in relation to these grant funds. The Auditor-General provided a follow-up response to Senator Hanson-Young on 24 July 2020. 

The Auditor-General responded on 17 June 2021 to correspondence from the Hon Mark Dreyfus QC, MP dated 21 May 2021, requesting that the Auditor-General conduct an investigation to examine how part-time members of the Social Services and Child Support Division and “sessional part-time members” in the Migration and Refugee Division of the Administrative Appeals Tribunal are being remunerated. 

The Auditor-General provided a follow-up response to the Hon Mark Dreyfus QC, MP on 17 December 2021. 

The Auditor-General responded on 13 April 2022 to correspondence from Mr Adam Bandt MP dated 24 March 2022, requesting that the Auditor-General conduct an investigation to examine the integrity of carbon credit methodology determinations made under the Carbon Credits (Carbon Farming Initiative) Act 2011, and the administration of the Act by the Clean Energy Regulator. 

The Auditor-General responded on 10 May 2018 to correspondence from Senators Patrick, Griff, Hanson-Young and Bernardi, Ms Rebekha Sharkie MP and the Hon. Tony Burke MP dated 24 April 2018, requesting that the Auditor-General conduct an investigation to examine the purchases of water for environmental flows in the Murray-Darling Basin. The Auditor-General provided a follow-up response on 29 April 2019.