In Senegal mutual health organisations (MHOs) have been present in the greater region of Thiès for years. Despite their benefits, in some areas there remain low take-up rates. For this study, an insurance literacy module was used to communicate the benefits of health microinsurance and the functioning of MHOs to a randomly selected sample of households in the city of Thiès. The effects of this training, and three cross-cutting marketing treatments, are evaluated using a randomised control trial. The study finds that the insurance literacy module has no impact, but that our marketing treatment has a significant effect on the take up decisions of households.