The Netherlands Authority for Consumers & Markets (ACM) last week launched its 'Cartels never go unnoticed' campaign. That public campaign is directed at increasing cartel awareness and calls on market parties to report suspicions of cartel practices. ACM has drawn up a “cartel check” to enable the public at large to test its ready knowledge of cartels. The campaign is accompanied by a playful video on ACM’s investigation methods. In that video an ACM “laboratory assistant” demonstrates the latest innovation in cartel investigation: robotised “flies on the wall” that infiltrate companies.