Participatory certification, also known as Participatory Guarantee Systems (PGS), used to assess the compliance of organic or agroecological production systems, has been widely disseminated worldwide in the last ten years. This study seek to analyze, based on the case of the Red de Productores y Consumidores “Comida sana y cercana” [Network of Producers and Consumers “Healthy and Local Food”], whether participatory certification can contribute to the territorialization of agroecology in the critical perspective of transforming agrifood systems.