Halet, along with Antoine Deltour, was convicted in 2016 of stealing confidential documents from their former employer, the consulting firm PWC, in 2012.
Halet was given a 9-month suspended sentence, later overturned by a Luxembourg appeals court, and fined €1,000. PWC was awarded symbolic losses of €1.
Halet has claimed that he should not have been prosecuted as both men were whistleblowers.
News of the ECHR case was announced by the support group Raphaël Halet lanceur d’alerte #LuxLeaks (Raphaël Halet Luxleaks whistleblower) on its social media accounts on Monday.
On Twitter, the advocacy group stated:
“Raphaël Halet’s request to the European Court of Human Rights (ECHR) against #Luxembourg has been accepted! Today [in the Luxleaks affair] it is Luxembourg that is in the dock! We’re not giving up on anything!”
La requête de Raphaël HALET à la Cour Européenne des Droits de l'Homme (CEDH) contre le #Luxembourg a été acceptée!
Aujourd'hui #Luxleaks c'est donc le Luxembourg qui est sur le banc des accusés !
On ne lâche rien!
— LuxLeaks Raphaël (@LuxLeaksRaphael) February 11, 2019
On the outfit’s Facebook page, Hallet said that Luxembourg:
“has to answer for the violation of the freedom of expression of a French citizen, a whistleblower.
“It’s a big step since 2012 and the beginning of the fight against tax evasion”.
As of Tuesday morning, the case was not listed in the ECHR’s online database.
A PWC representative told Delano the firm had “no comment”.