L'étrange monsieur Duvallier (1979)

Mr. Duvallier is an old, important French businessman who earned a lot of money in top-paying industries, but in fact, he's Raner, an ex-gangster - presumed dead - with a big loot and using a forged identity. Decided to redeem himself, he faces adventurous situations around the world with Laurence, his secretary (and the only person to know about his two faces).