"The International Organization for Migration (IOM) has conducted a scientifically rigorous impact evaluation to assess the impact of the Migrants as Messengers (MaM) campaign in Dakar, Senegal. MaM was a peer-to-peer awareness-raising campaign made by migrants for migrants and implemented in Senegal, Guinea and Nigeria from December 2017 to March 2019. The impact evaluation in Senegal focused on a key pillar of the MaM campaign, namely town hall events, which screened video testimonies of migrant returnees followed by interactive question and answer sessions with migrant returnees .. The impact evaluation provides evidence that peer-to-peer communication has measurable effects on potential migrants’ perception and intention, which are key prerequisites for safe migration decisions. This report focuses on the main impacts of the MaM events. Future analyses will further explore the rich datasets collected in this study." (Executive summary, page 1-2)