Renault reportedly is investigating a sponsorship deal with the Chateau de Versailles that included a EUR50,000 (US$57,000)personal benefit to its scandal-hit former chairman Carlos Ghosn.

The company now plans to alert prosecutors, it said in a statement cited by Reuters, confirming an earlier report in Le Figaro.

Renault's sponsorship of Versailles renovations also covered the rental of the Grand Trianon palace for Ghosn's 2016 wedding reception, the French daily reported.

The investigation has "identified that Mr Ghosn was accorded a personal benefit valued at EUR50,000 under the terms of a sponsorship contract with the Chateau de Versailles", Renault said on Thursday, according to Reuters.

"Renault has decided to bring these findings to the attention of the judicial authorities," it said.

The news agency noted the 8 October, 2016 wedding reception hosted by Ghosn and his second wife Carole attracted public attention for its opulence and Marie Antoinette-themed costumes.

The Renault board's ethics committee was informed about the discovery on Wednesday, as reported by the newspaper, a source with knowledge of the matter told Reuters.