What is Book and Claim?
Book and Claim lets you fund sustainable fuel used elsewhere in the network, and report the reduction as your own. It's the same model as renewable electricity certificates.
Start with your electricity.
It gives buyers a way to act from anywhere, without waiting for local physical availability.
You can't prove the exact electrons in your socket came from a wind farm. Yet when you buy renewable electricity, a certificate system means your purchase still funds renewable generation and lets you count it. Sustainable fuel works the same way. You fund the lower-emissions fuel, and a verified certificate records the reduction as yours, even when your own flight or vehicle ran on something else.
Because the fuel is not everywhere yet.
Sustainable fuel is still under one per cent of what aviation burns, and it is rarely available at the airport you fly from. If you had to physically load it into your own aircraft, most buyers couldn't act at all. Book and Claim removes that barrier. The fuel enters the supply where it makes sense, and the environmental attribute travels to the buyer who paid for it. It is how sustainable fuel scales before the physical supply reaches everywhere.
Book the attribute, claim the reduction.
A certified batch of sustainable fuel enters the network at an airport where it is available. Its environmental attribute, the verified reduction, is separated from the physical fuel, tracked on a registry, and retired to the party that funded it. That party claims the reduction. The fuel is burned by whoever loaded it. The attribute is owned once and retired once, so the same reduction is never claimed twice.
One batch, two reductions, no double counting.
A single batch of fuel can carry two different reductions. One is the airline's Scope 1, for the fuel it burns directly. The other is a corporate buyer's Scope 3, for the business travel in its value chain. Each is owned once and counted once within its own scope. An attribute claimed twice within the same scope would be worthless, and that is the line Book and Claim exists to hold. Two scopes, two owners, one batch, nothing counted twice.
The product is integrity, not logistics.
Book and Claim only works if the accounting holds. That is why every FEG transaction is certified to RSB and ISCC, and audited externally. Each is settled on a registry that produces a Registry Retirement Statement an auditor can follow. One claim, one owner, counted once. The reduction is measured on a lifecycle basis, not at the tailpipe, so it stands up to scrutiny.