In its official filing, Renault points a finger at a foreign private company for committing industrial espionage, setting the wheels in motion for a judicial investigation.
Renault did not accuse any foreign countries, any perpetrators or a company. Jean-Claude Marin, the Paris prosecutor who will consider Renault's allegations, said that only private persons were cited.
In this filing, Renault said that it was a victim of corruption, theft and concealment and also that it had discovered serious misconduct damaging to its "strategic, technological and intellectual assets."
Renault suspended three executives last week under the suspicion that they leaked information about its high-profile electric car technology.
The French government refers to this matter as "economic warfare" and has prompted a move to tighten laws to protect companies. Renault’s formal complaint means that the case is now in the hands of the French judiciary and it could lead to an investigation by France's DCRI domestic intelligence agency.
A government source had disclosed that intelligence services were looking into a possible connection to China. However, the French government has played down the possibility of a link to China, saying that no one is accusing one country of being involved.
China has also come out to deny the report. Renault's lawyer Jean Reinhart said that the filing mentioned many nationalities but no specific country has been cited.