The former head of the Bundesbank, Jens Weidmann, is said to keep an eye on the International Monetary Fund (IMF) for compliance with integrity standards.
Weidmann was appointed by the IMF to head an expert panel to strengthen institutional safeguards, the fund announced on Friday.
In an independent investigation, the committee is to show how the IMF can ensure effective complaints management, even for criticism of top management.
The fund had backed its executive director, Kristalina Georgieva, in a data manipulation scandal.
The background to the scandal was an investigative report by the law firm WilmerHale, according to which leading representatives of the World Bank - including its then managing director Georgieva - are said to have exerted "undue pressure" on employees in order for China to do better in the ranking of the widely acclaimed "Doing Business" report for 2018 leave.
At that time, the World Bank tried to get support from the government in Beijing for a large capital increase.
The head of the IMF herself has repeatedly denied the allegations.
The IMF concluded that the information available in the case did not allow any clear conclusions to be drawn about wrongdoing by the Bulgarian.
At the turn of the year, 53-year-old Weidmann resigned prematurely from the post of head of the Bundesbank after more than ten years and thus also left the Central Bank Council of the ECB.
His withdrawal was primarily seen as a sign of frustration with the European Central Bank's monetary policy.
He previously worked as an advisor to ex-Chancellor Angela Merkel.
According to his biography on the Bundesbank website, the economist worked at the IMF in Washington at the end of the 1990s.