The Robodebt scheme was an unlawful method of automated debt assessment and recovery implemented under the Liberal-National Coalition governments of Tony Abbott, Malcolm Turnbull and Scott Morrison, and employed by the Australian government agency, Services Australia, as part of its Centrelink payment compliance program. Put in place in July 2016 and announced to the public in December of the same year, the scheme aimed to replace the formerly manual system of calculating overpayments and issuing debt notices to welfare recipients with an automated data-matching system that compared Centrelink records with averaged income data from the Australian Taxation Office.
 The scheme has been the subject of considerable controversy, having been criticised by media, academics, advocacy groups, and politicians due to allegations of false or incorrectly calculated debt notices being issued, concerns over impacts on the physical and mental health of debt notice recipients, and questions around the lawfulness of the scheme. Robodebt has been the subject of an investigation by the Commonwealth Ombudsman, two Senate committee inquiries, several legal challenges and a royal commission, Australia's highest form of public inquiry. 
 In May 2020, the Morrison government announced that it would scrap the debt recovery scheme, with 470,000 wrongly-issued debts to be repaid in full. Amid enormous public pressure, Prime Minister Scott Morrison stated during Question Time that "I would apologise for any hurt or harm in the way that the Government has dealt with that issue and to anyone else who has found themselves in those situations." However, the Morrison government never offered a formal apology before it was voted out of office in 2022. 
 The Australian government lost a 2019 lawsuit over the legality of the income averaging process, and settled a class-action lawsuit in 2020. The scheme was further condemned by Federal Court Justice Bernard Murphy in his June 2021 ruling against the Government where he approved a A$1.8 billion settlement, including repayments of debts paid, wiping of outstanding debts, and legal costs.
 Going into the 2022 Australian federal election, Australian Labor Party (ALP) leader Anthony Albanese pledged to hold a royal commission into the Robodebt scheme if his party was elected. After winning the election, the Albanese government officially commenced the Royal Commission into the Robodebt Scheme in August 2022. The commission handed down its report in July 2023, which called the scheme a "costly failure of public administration, in both human and economic terms", and referred several individuals to law enforcement agencies for prosecution. The report also specifically criticised former Prime Minister Scott Morrison, who oversaw the introduction of the scheme when he was the Minister for Social Services, for misleading Cabinet and failing in his ministerial duties.
 In October 2022, the Albanese government effectively forgave the debts of 197,000 people that were still under review. In August 2023, the Albanese government passed a formal motion of apology in the House of Representatives, apologising for the scheme on behalf of the Parliament.
 Since the late 1970s, the Australian Tax Office (ATO) has used data-matching systems to compare income data received from external sources with income reported by taxpayers, to ensure taxation compliance. In 2001, Services Australia (then the Department of Human Services) piloted a program that compared a customer’s Centrelink income details with ATO data, to identify discrepancies in the information provided to Centrelink. Where there was a discrepancy, Services Australia would decide if the customer had been overpaid and had a debt that should be recovered. This program (known as the Income Matching System, or IMS) was fully rolled out in 2004. The IMS identified roughly 300,000 possible discrepancies per year. Services Australia would identify and investigate roughly 20,000 of the highest risk discrepancies per year, but were unable to investigate the remaining discrepancies, due to the costs and resources involved in manually investigating and raising debts. The IMS continued largely unchanged until the introduction of the Robodebt scheme in 2016.
 In April 2015, measures to create budgetary savings by increasing the pursuit of outstanding debts and investigation of cases of fraud in the Australian welfare system were first flagged by the Minister for Social Services Scott Morrison and the Minister for Human Services Marise Payne, and formally announced by the Abbott government in the 2015 Australian federal budget. Initial estimates in the 2015 budget projected that the scheme would recoup A$1.5 billion for the government.
 In 2015, the Department of Human Services conducted a two-stage pilot of the Robodebt scheme, targeting debts of selected welfare recipients that were accrued between 2011–2013. Following the 2015 Liberal Party Leadership Spill and 2016 Australian federal election, the Turnbull government implemented an overhaul of the federal welfare budget in an effort to crack down on Centrelink overpayments believed to have occurred between 2010 and 2013 under the Gillard government.
 In July 2016, the manual system began to be replaced with the Online Compliance Intervention, an automated data-matching technique with less human oversight, capable of identifying and issuing computer-generated debt notices to welfare recipients who had potentially been overpaid. The new system was fully online by September 2016. In December 2016, Minister for Social Services Christian Porter publicly announced the implementation of this new automated debt recovery scheme – which was given the colloquial name "Robodebt" by the media – was estimated to be capable of issuing debt notices at a rate of 20,000 a week.
 The scheme went through several iterations and formal names, including:
 In early January 2017, six months after the commencement of automated debt recovery, it was announced that the scheme had issued 169,000 debt notices, and recovered A$300 million. Based on these figures, it was suggested that a similar automated debt recovery system would be applied to the Aged Pension and Disability Pension, in order to potentially recover a further A$1 billion.
 The 2018 Australian federal budget indicated that the Robodebt data matching scheme would be extended into 2021, with the aim of recovering an additional A$373 million from welfare recipients.
 Services Australia announced in September 2019 that expenditure on the Robodebt program was A$606 million while recouping A$785 million.
 Opponents of the Robodebt scheme said that errors in the system were leading to welfare recipients paying non-existent debts or debts that are larger than what they actually owe, whilst some welfare recipients had been required to make payments while contesting their debts. In some cases, the debts being pursued dated back further than the ATO requests that Australians retain their documentation.  Particular criticism focused on the burden of proof being moved from Centrelink needing to verify the information, to being on the individual to prove they did not owe the funds, with human interaction being very limited in the dispatch of the debt letters.
 Politicians from the Australian Labor Party, Australian Greens, Pauline Hanson's One Nation and Independent Andrew Wilkie, criticized the scheme and its automated debt calculation methods. The scheme was also criticized by advocacy groups for people affected by poverty, disadvantage and inequality, including the Australian Council of Social Services (ACOSS) and the Saint Vincent de Paul Society.
 Allegations levelled against the scheme by the media, former and current welfare recipients, advocacy groups, politicians and relatives of welfare recipients include:
 After the Turnbull government implemented the Robodebt scheme, many recipients of debt notices filed complaints with the Commonwealth Ombudsman. This led to the agency investigating the scheme, with the final report and recommendations delivered in April 2017. The recommendations from the ombudsman are as follows:
 The Robodebt scheme was the subject of a Senate committee inquiry beginning in 2017. The inquiry had a number of findings and made a number of recommendations, including:
 In February 2019, Legal Aid Victoria announced a federal court challenge of the scheme's calculations used to estimate debt, stating that the calculations assumed that people are working regular, full-time hours when calculating income. In November 2019, the federal government agreed to orders by the Federal Court of Australia in Amato v the Commonwealth that the averaging process using ATO income data to calculate debts was unlawful, and announced that it would no longer raise debts without first gathering evidence – such as payslips – to prove a person had underreported their earnings to Centrelink.
 In September 2019 Gordon Legal announced their intention of filing a class action suit challenging the legal foundations of the Robodebt system. On 16 November 2020, the day before the trial was due to begin, the Australian government announced that it had struck a deal with Gordon Legal, to settle out-of-court. The deal saw 400,000 victims of Robodebt share in an additional A$112 million compensation, on top of the additional 470,000 Robodebts (totalling around A$720 million) that the Commonwealth government had already agreed to refund or cease pursuing.
 On 29 May 2020, Stuart Robert, Minister for Government Services announced that the Robodebt debt recovery scheme was to be scrapped by the Government, with 470,000 wrongly-issued debts to be repaid in full.
 Initially, the total sum of the repayments was estimated to be A$721 million. However, in November 2020 this figure expanded to A$1.2 billion after the Australian government settled a class-action lawsuit before it could go to trial.
 On 31 May 2020, Attorney-General Christian Porter, who was Minister for Social Services when the Robodebt system was first implemented, and who had previously defended the scheme, conceded that the use of averaged income data to calculate welfare overpayments was unlawful, stating that there was "no lawful basis for it".
 After weeks of criticism from the Opposition,  in June 2020, Prime Minister Scott Morrison, in response to a question from the opposition concerning a particular victim of the scheme, stated in parliament that "I would apologise for any hurt or harm in the way that the Government has dealt with that issue and to anyone else who has found themselves in those situations". As of 31 July 2020, it was announced that A$224 million had been repaid to more than 145,000 welfare recipients.
 On 11 June 2021, the Federal Court approved a A$1.872 billion settlement incorporating repayment of A$751 million, wiping of all remaining debts, and the legal costs running to A$8.4 million. In ruling against the scheme, Justice Bernard Murphy described it as a "shameful chapter in the administration of the commonwealth" and "a massive failure of public administration”. The Federal Treasurer Josh Frydenberg said the government accepted the settlement, but distanced himself from the suicides and mental health issues surrounding the administration of the scheme. Services Australia has stated they will commence repayments in 2022 to people who have overpaid according to debt recalculations.
 In October 2022, the Albanese Government effectively forgave the debts of 197,000 people who were still under review.
 The scheme was again the subject of a Senate committee inquiry, which began in 2019.
 In the July 2020 hearing, Kathryn Campbell (former head of Services Australia) denied that the scheme had led to welfare recipients suiciding after receiving debt notices, despite allegations from Centrelink staff and the family members of welfare recipients who took their own lives. 
 Senator O'Neill in the August 2020 hearing, read two letters from mothers whose sons died by suicide following the receiving of a Robodebt notice.
 Initially meant to report its findings in December 2019, the inquiry's deadline was extended six times, with the Senate committee delivering its final report in May 2022. The five interim reports made several findings, including:
 The sixth and final report made a single recommendation:
 In June 2020, the Greens and Labor called for a Royal Commission into Robodebt, to "determine those responsible for the scheme, and its impact on Australians". These calls have been reiterated by university academics, and by ACOSS, which stated that "although some restitution has been delivered to victims of Robodebt, they have not received justice". 
 In May 2022, the sixth and final report from the second Senate inquiry into the scheme recommended a Royal Commission, "to completely understand how the failures of the Income Compliance Program came to pass, and why they were allowed to continue for so long despite the dire impacts on people issued with debts".
 In June 2020 Labor had stated that only a Royal Commission would be able to obtain the truth about Robodebt. Labor subsequently budgeted $30M in its election costings for the 2022 election for a Royal Commission into the Robodebt Scheme. ACOSS chief executive Cassandra Goldie welcomed this saying "The Robodebt affair was not just a maladministration scandal, it was a human tragedy that resulted in people taking their lives".
 Following Labor’s election win, Prime Minister Anthony Albanese announced the Royal Commission into the Robodebt Scheme, with Letters Patent issued on 25 August 2022. The Royal Commission was chaired by former Queensland Supreme Court Justice Catherine Holmes and was expected to conclude on 18 April 2023. The deadline was extended twice, first until 30 June and later until 7 July 2023.
 In November 2022 it was disclosed that legal advice before the scheme started was that it did not comply with legislation. Commissioner Catherine Holmes asked DSS lawyer Anne Pulford "You get an advice in draft, and if it's not favourable you just leave it that way?"; Pulford responded "Yes, Commissioner".
 The final report of the Royal Commission was released on 7 July 2023. Along with 57 recommendations, a sealed section referred several unnamed individuals for further investigation or action, to four separate bodies.
 Kathryn Campbell, then working on the AUKUS program at the Department of Defence, was suspended without pay from her role on 20 July. 
Kathryn Campbell resigned from the Department of Defence effective 21 July 2023.