... and the case could lead to the nationwide dissolution of the controversial organisation.
The so-called church is accused of targeting vulnerable people for commercial gain.
France, which categorises Scientology as a sect, has previously convicted several individual Scientologists of fraud over the past decades – most notably its science fiction-writing creator, L Ron Hubbard, in 1978.
The Guardian reports that the case stems from the testimony of a French woman who filed an official complaint against the organisation in 1998.
Lawyers for Aude-Claire Malton claim Scientologists preyed upon her at a time when she was "very psychologically fragile", pressuring her into spending €21,000 (£18,000) – her life savings – on products including "purification packs" and vitamins.
The investigating magistrate in charge of bringing the case against the church, Jean-Christophe Hullin, said the church, which has been glamourised by Hollywood members such as Tom Cruise and John Travolta, made a profit by placing individuals in a "state of subjection". The organisation, he argued, is "first and foremost a commercial business" whose actions reveal "a real obsession for financial remuneration".