In February 2015, the International Consortium of Investigative Journalists, Le Monde, The Guardian and other outlets published the Swiss Leaks investigation, based on files taken by former HSBC software engineer Hervé Falciani. The data covered more than 100,000 clients and 20,000 offshore companies at HSBC’s Geneva subsidiary, with investigators alleging that €180.6 billion passed through the accounts between November 2006 and March 2007. French authorities received the files in late 2008 and began sharing information with foreign tax agencies by early 2010.
The investigation alleged that HSBC’s Swiss operation helped wealthy customers conceal assets and, in some cases, assisted people linked to suspected drug trafficking, corruption, money laundering or arms dealing. In April 2015, French heiress Arlette Ricci was convicted of hiding roughly €18 million, receiving a three-year sentence with two years suspended, property seizures and a €1 million fine. HSBC’s Swiss bank was charged in France in April 2015; in November 2017, HSBC agreed to pay €300 million to avoid trial under a French settlement procedure. French prosecutors subsequently dropped the case against HSBC Holdings. The disclosures also produced tax assessments in multiple countries, including India’s identification of about ₹8,465 crore in undeclared assets by July 2021.