Overview
Book-and-claim is a chain-of-custody approach that separates the environmental attributes of a product or service from its physical delivery. In freight decarbonization, it allows a shipper or logistics provider to purchase attributes associated with a lower-emission transport activity even when its own goods do not travel on the vehicle using the cleaner fuel or technology.
The approach can help fund lower-emission transport where fuel supplies, routes, or infrastructure make direct procurement difficult. Its credibility depends on reliable measurement, verification, and exclusive ownership and retirement of the attributes. Organizations including the Smart Freight Centre and the Roundtable on Sustainable Biomaterials have developed guidance or initiatives relevant to transport book-and-claim systems.
A book-and-claim certificate is not evidence that the buyer’s particular shipment physically used a lower-emission fuel. Nor does its purchase automatically establish a valid greenhouse-gas inventory adjustment: that depends on the applicable accounting rules and the evidence supporting the claim.
Etymology and Origins
The name describes two actions: an eligible environmental attribute is booked into an accounting system, and a buyer subsequently claims it. The terminology reflects a broader chain-of-custody distinction between tracking a physical product and tracking an associated environmental attribute separately. A precise first documented use of the term, either generally or in freight, has not been established here.
An important precedent is the market for renewable energy certificates, which represent the environmental attributes of renewable electricity generation. Such certificates illustrate attribute accounting, although electricity and freight fuel programs have different boundaries and rules. Contemporary transport applications build on earlier forms of environmental attribute trading and the Roundtable on Sustainable Biomaterials’ sustainability certification work. ISO 22095:2020 later codified book-and-claim as one of several general chain-of-custody models, alongside segregated and mass-balance approaches.
Historical Development
Environmental attribute markets for renewable electricity developed before book-and-claim became a prominent freight-decarbonization tool. They offered a model for funding a change in production without requiring the purchaser to trace individual physical units through a shared network. The U.S. Environmental Protection Agency’s explanation of renewable energy certificates describes that separation of electricity and environmental attributes. U.S. certificate trading was established around the turn of the century, well before freight programs became widespread.
In the 2010s, corporate value-chain accounting became an important foundation for freight emissions reporting. The Greenhouse Gas Protocol’s Corporate Value Chain, or Scope 3, Standard, published in 2011, provided a framework for companies to account for indirect emissions, including relevant transportation activities. It did not by itself establish that every book-and-claim purchase can be deducted from a company’s inventory. The GHG Protocol’s subsequent Scope 2 Guidance, published in 2015, addressed contractual instruments for purchased electricity; its rules should not be transferred automatically to freight fuel claims.
In the 2020s, transport-sector initiatives expanded work on certificates, registries and accounting safeguards for lower-emission fuels and services. A separate milestone was publication of ISO 14083:2023, which standardizes quantification and reporting of greenhouse-gas emissions from transport chain operations. The standard provides a measurement foundation; it should not be confused with a universal rule authorizing a particular certificate claim. ISO 22095:2020 likewise defines chain-of-custody models but does not set freight-specific eligibility or inventory rules. Recordkeeping has evolved from contractual and spreadsheet-based records toward digital registries, though the technology used and the degree of independent verification vary by program.
Core Concepts
A typical transaction involves a fuel producer or transport operator, a verifier or certification body, a registry, and a buyer such as a shipper. The process generally follows these steps:
- Establish eligibility. A program specifies the eligible fuel or transport activity, sustainability criteria, accounting boundary and required evidence.
- Measure the activity. The operator documents fuel production, delivery or consumption, as required, and calculates emissions using the program’s lifecycle methodology and baseline.
- Issue attributes. After required checks, the registry records eligible attributes with identifiers and quantities.
- Transfer and retire. A buyer acquires the attributes and retires them for a defined claim, preventing further resale or use within that system.
- Report. The buyer describes what it purchased, the applicable period, methodology and limitations, and applies any inventory treatment only where the relevant standard permits it.
The environmental benefit is generally calculated against a specified conventional-fuel or service baseline. For example, if an eligible activity has a verified lifecycle saving of 100 tonnes of CO₂ equivalent and a buyer acquires and retires 20% of the eligible attributes, its allocated amount would be 20 tonnes—provided the program permits that allocation and no overlapping claim exists. This is an illustration, not a guarantee that the buyer may subtract 20 tonnes from its reported inventory.
Lifecycle boundaries matter: a comparison based only on vehicle exhaust can differ substantially from one covering fuel production and use. ISO 14083 addresses transport emissions quantification, while the GHG Protocol Scope 3 Standard provides the broader corporate value-chain accounting context.
A certificate’s unit also matters. Before comparing offers, distinguish a quantity of fuel or energy from a calculated quantity of emissions savings; the latter depends on a baseline and calculation method. This is a practical consequence of the GHG Protocol’s emphasis on consistent value-chain accounting.
Freight Applications and Approaches
Ocean freight. A carrier may consume an eligible alternative marine fuel on one vessel while a customer purchases the corresponding attributes for freight carried elsewhere in the carrier’s network. The customer should not claim that its own container physically traveled on that fuel unless separate evidence supports that statement.
Air freight. A cargo customer may support eligible sustainable aviation fuel even when the fuel is supplied at an airport outside its shipment’s route. Aviation programs must also address how voluntary attributes interact with regulatory uses of the same fuel, including frameworks such as ICAO’s CORSIA.
Road freight and logistics services. Programs can allocate eligible attributes from lower-emission fuels or services to customers unable to procure them directly on their lanes. Specific rules differ on eligible technologies, geography, timing and allocation. The Smart Freight Centre provides a sector-wide context for freight emissions measurement and decarbonization.
Book-and-claim differs from physical segregation, in which the specified product is kept separate, and from mass balance, in which eligible and conventional material may be mixed but administrative quantities are reconciled within defined boundaries. Under ISO 22095, book-and-claim permits a looser physical connection between the eligible activity and the buyer’s product or shipment than segregation or mass balance.
Benefits, Risks and Limitations
Book-and-claim can connect demand with supply when lower-emission fuel is available only at certain ports, airports or depots. It can also pool demand from smaller shippers and provide revenue that helps address the price premium of eligible alternatives. These benefits depend on contractual terms and the extent to which the purchase influences production or use; they should not be assumed merely because a certificate exists. The Roundtable on Sustainable Biomaterials addresses sustainability assurance in fuel and material supply chains.
Key risks include:
- Double issuance or double claiming: the same benefit is sold twice, or a carrier and customer make incompatible claims about it.
- Weak lifecycle accounting: missing emissions, an unsuitable baseline or inconsistent units exaggerate the benefit.
- Uncertain causation: a purchase may finance an activity that would have occurred anyway; programs differ in how they address this question.
- Poor traceability: inadequate evidence of fuel use, transfer or retirement undermines the audit trail.
- Misleading communications: describing an attribute purchase as proof that a specific shipment used cleaner fuel can overstate what happened.
- Accounting uncertainty: voluntary claims, corporate inventories and regulatory obligations do not necessarily use the same rules.
A registry can reduce duplication risk, but it cannot eliminate it without controls across registries and programs. As with renewable energy certificates, ownership and exclusive retirement are central to credible attribute claims. Retirement in one registry is not, on its own, proof that the same underlying activity was not registered or claimed elsewhere.
Implementation and Reporting Best Practices
Before purchasing, a shipper should review the program’s eligibility criteria, independent verification requirements, lifecycle method, baseline, vintage, geography and treatment of co-products. Contracts should state who owns the attributes, which parties may make which claims, and whether the attributes have been used for any other voluntary or regulatory purpose.
Retain evidence of issuance, transfers, retirement, underlying activity and calculation assumptions. Reconcile certificate quantities with the intended reporting period and avoid allocating more attributes than the eligible activity produced. Use transport activity data and an established quantification method, such as ISO 14083, alongside the relevant corporate accounting guidance in the GHG Protocol.
As a practical control, record the certificate identifier, beneficiary, retirement date, quantity and unit alongside the supplier’s calculation and verification evidence. Ask the supplier how it prevents overlap with other registries and with carrier claims. Apply the relevant Scope 3 accounting guidance to the company’s own reporting boundary rather than assuming that a supplier’s marketing description determines inventory treatment.
Illustrative disclosure: “We retired attributes representing 20 tonnes of calculated lifecycle CO₂e savings under the named program. The underlying fuel was used elsewhere in the transport network; these attributes do not demonstrate physical use on our shipments.” Add the reporting period, methodology and inventory treatment appropriate to the actual transaction.
In public reporting, distinguish the physical emissions estimate from any separately reported certificate-based claim. State the program, quantity, lifecycle boundary and whether the claim is included in an inventory or disclosed separately. If the applicable accounting framework does not clearly permit an adjustment, a transparent separate disclosure is preferable to an unsupported deduction.