Participatory Guarantee systems (PGS): Participatory Guarantee Systems (PGS) are alternative food certification systems that are based on trust and transparency. PGS systems are often used by small-scale farmers and food producers who want to sell their products directly to consumers. PGS systems involve farmers and consumers working together to assess the safety and quality of food products. This can help to build trust between farmers and consumers, and it can also help to ensure that food is produced in a sustainable and ethical way.