The evidence, which the French firm says came to light during compliance audits undertaken following Ghosn's arrest last year on charges of financial misconduct related to his other role as chairman of Nissan. Renault says that the discovery, the first suggestion of Ghosn using Renault funds for his "personal benefit", requires "further checks to be carried out".
The contribution was part of a larger charitable donation agreement between Renault and the Chateau de Versailles, which allowed the firm to use the palace for events. Ghosn held his wedding at Versaille in 2016, and it is thought he used the venue as part of its arrangement with Renault.
According to The Financial Times, Ghosn's lawyer issued a statement offering to repay the money. It read: “Carlos Ghosn paid for all of his wedding expenses. The event space at Versailles was made available to him without charge, and Mr Ghosn was unaware that the use of the space would be charged against Renault's allotted usage.”
Renault initially kept Ghosn as chairman and CEO following his initial request, but he recently stood down from both roles to focus on his forthcoming court case in Japan.
Former Michelin CEO Jean-Dominique Senard has now been named director and chairman, while Ghosn's former deputy, Thierry Bolloré, takes over as CEO in a move to new structure less reliant on one individual.
The French government earlier revealed that Ghosn decided to resign after reports he would be ousted from the French car maker in an emergency board meeting. The decision is believed to be an attempt to heal the rift between allies Nissan and Renault that has developed since the scandal broke.