Antoine Deltour: LuxLeaks whistleblower speaks out

International Tax Review is part of Legal Benchmarking Limited, 1-2 Paris Garden, London, SE1 8ND

Copyright © Legal Benchmarking Limited and its affiliated companies 2026

Accessibility | Terms of Use | Privacy Policy | Modern Slavery Statement


Antoine Deltour: LuxLeaks whistleblower speaks out

Deltour-Antoine-c

Antoine Deltour, one of the two whistleblowers at the centre of the LuxLeaks scandal, said that he had “mixed feelings” after his conviction for leaking confidential information was upheld, but his sentence was reduced.

Luxembourg’s Cite Judiciare upheld an earlier judgment against the former PwC employee, as well as his ex-colleague Raphaël Halet , but reduced Deltour’s 12-month suspended prison sentence to six months.

“There was a lot of support outside the court. It is a partial victory that for the first time in Europe that a national judge recognised the whistleblower status for revealing professional secrecy, but a satisfying judgment would have been a full acquittal,” Deltour told International Tax Review.

The Frenchman also revealed to International Tax Review that he is considering appealing the decision.

“I need time to read carefully the judgment and then I will make a decision,” he said. “The last possibility [is] to contest the judgement and it will allow me to go to the European Court of Human Rights, but I haven’t made a decision yet.”

Despite the fact that he was convicted, Deltour is optimistic that his case will have a positive impact and bring greater tax transparency in the future.

“It’s a step forward to whistleblowers in Europe, as my lawyer said it is the first time a European judge recognised whistleblower statues . I think it is step forward for tax justice.”

“Unfortunately, the first trial and the appeal trial gave a lot of attention to the messenger and not to the message, which is about tax competition in Europe and how it is more or a little more transparent thanks to the leak. Tax competition is more intense than ever with the decreasing corporate tax rates everywhere in Europe and I think that is having consequences on budgets and public policing.”

“Today’s decision is a recognition of my role in this story,” he added.

more across site & shared bottom lb ros

More from across our site

Jaydeep Menon explains how Frazier & Deeter built a specialist practice which helps UK start-ups expand into the US and why private equity backing is accelerating its ambitions
As joint audits, data sharing and pillar two reshape tax controversy, multinational groups can no longer afford to manage disputes one jurisdiction at a time
Brazil's tax system is being reshaped by VAT , pillar two and TP reform. Fallet explains why those changes convinced him to lead a new practice
The agreement with Daribatech, alongside recent high-profile investment in talent, suggests the firm is gearing up for a significant push in the region
Several factors have led to a steady transition of TP work away from traditional advisers and towards full-service law firms, DLA Piper’s new TP leader says
Julian Balson's departure from EY's Tier 1 tax controversy practice for lower-ranked Fieldfisher represents one of the more eye-catching UK hires of the year
Former IRS commissioner Danny Werfel argues that the biggest obstacle to AI adoption in tax is not technology, but trust, and introduces a practical AI risk framework to help
Howell takes a deep dive into how he led the landmark PepsiCo dispute, discusses the ATO's enforcement priorities, and emphasises KordaMentha's market ambitions
Global tax leader David Linke said that the TaxSim gaming programme could replace aspects of traditional face-to-face learning
Former ATO economist Craig Silverwood is joining from Australian firm MinterEllison
Gift this article