In the context of arbitration, proof of corruption today represents a real challenge. Neither the arbitrator nor the Courts reviewing an award have the investigative powers of a Criminal Court to bring to light actions which by nature have been dissimulated. Nevertheless, over the last few years, cases involving corruption have multiplied and, in the administration of proof, arbitral and judicial approaches have become clearer. This review intends to take stock of the current position. The results seem encouraging, however the system could still be improved. To this end, this article is in favour of strengthening the role of the Courts which review awards, using the tools which the Criminal Procedure and Civil Procedure Codes provide.