We explore the functioning of the BPA and CPB instruments, which are essential for biomethane sales, with ATEE. In this video interview, Raphaël Boukobza, a legal expert from Club Biogaz, explains that BPAs (Biogas Purchase Agreements) are private agreements between a biomethane seller and buyer. They are not incentive tariff contracts and are usually long-term. Biogas Production Certificates (CPBs), on the other hand, are contracts involving obligated entities—such as gas suppliers—who must purchase a certain quantity of biomethane to meet regulatory or environmental targets.