The Ambassador

Director Mads Brügger pretends to be a South African diplomat to uncover the illegal trade in diamonds in Central Africa. This is the official summary:

A strange, enigmatic and decadent white diplomat arrives in central Africa, looking like a mixture of Henry Stanley and Karl Lagerfeld. He has recently bought an ambassadorship and claims to be a do-good rich business man, who has come to spearhead a diplomatic mission. Officially he is there to start a factory that produces matches - this, to employ locals and teach how to make this simple piece of fire-making equipment. Unofficially he is really there to gain access to vast reserves of diamonds. The Ambassador is a genre-breaking, tragic comedy about the bizarre world of African diplomacy.