Book and Claim Model

Definition ∞ The Book and Claim Model is an accounting and tracking system used to enable the separation of physical attributes from environmental benefits, particularly for sustainable products like renewable energy or sustainable aviation fuels. Under this model, a producer generates a sustainable product and registers its environmental attributes as a credit. A consumer then purchases these credits, allowing them to claim the environmental benefit without necessarily receiving the physical sustainable product directly. This system facilitates the financing and expansion of sustainable production.
Context ∞ In the context of environmental credits and sustainable aviation fuels (SAFs), the Book and Claim Model is a critical mechanism for promoting decarbonization efforts. News reports often discuss its role in enabling airlines to claim SAF usage even if the fuel is not physically delivered to their specific aircraft due to logistical complexities. Blockchain technology is increasingly considered for enhancing the transparency and verifiability of these credit transactions, addressing concerns about double-counting or greenwashing. The model’s efficacy is a key debate point in establishing credible sustainability claims within global supply chains.