Why Scope 3 credit claims are under pressure and what a new standard is trying to solve

Scope 3 claims are getting harder to defend because disclosure expectations are rising and greenwashing risk is rising with them. As climate reporting becomes more formalised, companies are being pushed to show not just that they “bought credits”, but that their claims match real-world decarbonisation and are not misleading about where emissions sit in the value chain.

Scope 3 disclosure is already widespread, but uneven and often inconsistent in quality. The OECD reports that in 2022, 4,246 companies, around 60% by market capitalisation, reported Scope 3 emissions, with strong geographic gaps and much higher reporting in Europe. That mix of broad adoption plus uneven practice is exactly where scrutiny tends to land.

Scope 3 is the battleground because it is usually most of the footprint. Guidance and literature commonly cite that for many companies, value chain emissions are roughly 70% to 90% of total emissions. When most emissions sit outside your direct operations, any claim that implies “we addressed our footprint” will be judged primarily on what you did about Scope 3, not on Scope 1 and 2.

Procurement-driven sectors feel this most sharply because upstream emissions can dwarf operational emissions. BCG and CDP have highlighted that upstream Scope 3 emissions can be about 26 times higher than a company’s operational emissions. That ratio helps explain why budgets are shifting toward supplier programs, low-carbon materials, and logistics decarbonisation, and away from relying on offsetting as the only lever.

The technical problem is that the market still mixes several concepts that look similar in marketing but behave very differently in accounting and assurance. Insetting, value chain interventions, book-and-claim systems, and traditional offsetting often get bundled together, even though they differ on quantification boundaries, attribution rules, and what “ownership” of a claim really means. Without consistent rules, the risk of double counting and double claiming rises, which is exactly what integrity frameworks like ICVCM’s Core Carbon Principles try to reduce.

Verra’s answer is a new program that starts in 2026. Verra has announced the Scope 3 Standard Program v1.0 with a phased launch, and Phase 1 in Q1 2026 enables pipeline listing of Scope 3 interventions in the Verra registry using an initial set of adapted methodologies. Once you accept that pressure is structural, the practical question becomes operational: what do buyers need to change in data, supplier engagement, and claim design to be ready?

How corporate buyers should prepare: data, supplier engagement, and claim design for value chain emissions

A credible Scope 3 strategy starts with a baseline you can defend under audit. Companies should build category-level baselines aligned to the GHG Protocol Scope 3 categories, then prioritise moving from spend-based estimates to activity data and supplier-specific data for the categories that drive most emissions. The OECD’s findings on widespread Scope 3 reporting alongside uneven practice is a reminder that “reported” does not mean “decision-grade”.

Data quality needs to be managed like a control system, not like a one-off footprint exercise. Buyers should implement data quality scoring by category and supplier, maintain an audit trail for emission factors and calculations, and set a cadence for updates that matches business reality, typically annual for most categories and more frequent for fast-moving categories like freight or energy-intensive inputs where data can change quickly.

Supplier engagement has to be “MRV-ready” if you want insetting-style outcomes that stand up to scrutiny. Procurement can require contractual data deliverables such as product carbon footprints (PCFs), environmental product declarations (EPDs) where relevant, fuel and energy use, fertiliser rates, metering data, and documented calculation methods. Incentives also matter, including preferred supplier status, shared savings, and price premiums for demonstrably lower-carbon materials or services.

Each supplier program should map cleanly to a Scope 3 category and to a business activity. Purchased goods and services, upstream transportation and distribution, and fuel and energy-related activities are common starting points because they connect directly to procurement levers and measurable operational data.

Claim design should separate offset claims from value chain contribution claims. VCMI’s Claims Code of Practice is useful here because it pushes companies away from absolute product-level claims that imply full neutralisation, and toward clearer language about what was reduced internally versus what was financed or enabled beyond the boundary. This is not just a marketing choice; it is a risk choice, because ambiguous claims are the ones that get challenged.

A simple “do/don’t” rule helps. Do describe the intervention, boundary, and how it relates to your value chain emissions category. Don’t imply that buying units automatically makes a product or company “carbon neutral” unless you can substantiate the full accounting logic, boundaries, and treatment of residual emissions in a way that matches your public methodology.

Governance needs to treat claims as risk-managed disclosure. Companies should define internal owners across Procurement, Sustainability, Finance, and Legal, set materiality thresholds for what requires escalation, and create a formal approval path for external statements. The goal is to avoid a situation where procurement buys something that sustainability cannot credibly account for, or where marketing says something legal cannot defend.

Evidence should be designed into sourcing, not reconstructed after the fact. Buyers can standardise MRV-ready templates that capture boundaries, periods, emission factors, estimation methods, QA/QC checks, and third-party verification status. Once data and claims are structured, the next question becomes what will actually be eligible and how it will be labelled in the new program.

What to expect in credit eligibility and labeling: beyond offsetting toward value chain contribution and insetting logic

Verra’s Scope 3 Standard is positioned as more than traditional project crediting. Verra describes the program as certifying Scope 3 interventions and issuing Intervention Units (IUs) that represent GHG benefits from interventions in the value chain, using standardised methodologies, including adapted VCS methodologies where applicable. Operationally, that signals a shift from “a credit is a credit” toward “a unit is defined by how it connects to value chain accounting”.

The 2026 rollout is phased, so expectations on supply should be realistic. Verra has communicated that Phase 1 in Q1 2026 enables pipeline listing, with later phases moving toward full operation including validation, registration, verification, and issuance. In practice, many companies may see a growing pipeline in 2026 without immediately seeing large volumes of verified, issued units that are ready for retirement and claims.

The direction of travel is “beyond offsetting” in how companies communicate. SBTi’s consultation on Beyond Value Chain Mitigation reflects the broader market move toward contribution framing, where companies finance mitigation outside their inventory while still prioritising deep reductions in their own value chain. For buyers, this matters because contribution-style claims can reduce the pressure to prove a one-to-one “offset” relationship for Scope 3 categories, while still requiring strong evidence and transparency.

Insetting logic becomes more central when interventions are explicitly tied to a company’s Scope 3 hotspots. That is attractive for buyers who want to show progress on purchased goods, freight, or commodity supply chains, and who want claims that resonate with B2B customers and investors who increasingly ask, “What changed in your supply chain?”

Labeling and metadata are likely to matter more, not less. Verra already uses registry labels for things like CORSIA eligibility and Article 6 authorisation on qualifying credits, and Verra has indicated in stakeholder updates that registry metadata is becoming a key way to communicate eligibility and use. The practical implication is that procurement teams will need to buy not just “a unit”, but “a unit with the right label and attributes for the intended claim”.

Portfolio strategy will likely split into two buckets. One bucket is residual emissions neutralisation, where a company’s internal policy allows it and where claims are carefully controlled. The other bucket is value chain interventions and IUs targeted at hotspot categories such as steel, cement, agricultural commodities, and freight, designed to support credible value chain progress narratives aligned with internal targets and external claims guidance. Once eligibility and labeling change, procurement and contracting need to change with them.

Implications for procurement and contracting: due diligence, MRV requirements, and audit-ready documentation

Due diligence becomes more data-first when the claim is tied to Scope 3. Traditional carbon credit due diligence focuses on additionality, leakage, permanence, and baseline setting. For Scope 3 interventions, buyers also need due diligence on the chain of attribution: who is proposing the intervention, which suppliers or assets are involved, what product or commodity is covered, what time period is being claimed, and how the benefit is allocated across multiple buyers.

Contracts need to specify MRV deliverables in a way that supports both third-party verification and corporate audit. Buyers should require a monitoring plan, datasets, emission factors, QA/QC procedures, and clear statements on what was measured versus modelled. Audit rights, non-conformance handling, and make-good provisions matter because the cost of a failed claim is often larger than the cost of replacing a unit.

Registry mechanics should be contract terms, not assumptions. Contracts should define how serial numbers will be handled, what constitutes valid retirement, and what evidence will be provided to support retirement and prevent disputes. This is one of the simplest ways to reduce double claiming risk in practice.

RFPs and vendor scoring should incorporate integrity and claims alignment. ICVCM’s Core Carbon Principles provide a reference point for quality criteria where relevant, and VCMI provides a reference point for how claims should be framed and substantiated. Procurement can translate these into scored requirements such as transparency, public documentation, verification status, and clarity on how the unit supports a specific claim type.

Audit-ready documentation should be assembled as an evidence pack per claim. That pack typically includes the company’s claim policy, Scope 3 boundary and category mapping, calculation files, contracts and amendments, assurance statements, registry retirement records, and a clear mapping from claim to emission category and period. The OECD’s discussion of Scope 3 reporting scale and unevenness is a reminder that comparability pressures will keep increasing, so evidence packs are becoming a normal cost of credible claims.

Pricing and risk allocation will shift toward traceability and robust MRV. Buyers should expect that units with stronger value chain traceability and assurance-grade data can command a premium, and they should decide upfront how to handle risks like methodology updates, baseline changes, or registry rule changes. A regulatory change clause is not just for compliance markets; it is also a practical tool in voluntary contracts when standards are evolving.

Procurement can demand MRV and evidence, but supply needs to be able to deliver it. That is where project developers and intervention proponents will feel the biggest change.

Developers will need to design interventions for Scope 3 accounting, not just for offset issuance. Verra has indicated that the Scope 3 Standard Program will use standardised methodologies and, in v1.0, adapted VCS methodologies where applicable. That implies changes to project documentation and monitoring so that the intervention can be assessed as a Scope 3 intervention with clear attribution logic.

Additionality will increasingly be tested against buyer-linked causality, not only against classic project finance logic. Buyers will want evidence that the intervention happened or scaled because procurement created demand, such as offtake agreements, price premiums, contract amendments, or supplier participation agreements. The key shift is that “the project is additional” may not be enough if the buyer’s claim depends on proving a credible link to value chain change.

Attribution rules will be a central design constraint in multi-actor supply chains. When traders, processors, brands, and retailers all touch the same commodity flow, developers will need clear allocation logic for units across multiple buyers and controls to prevent double claiming. Industry stakeholders have pushed concepts like functional equivalence and interoperability to help make Scope 3 accounting consistent across systems, and developers should expect buyers to ask how their approach fits into that direction.

MRV will need to be more granular and more assurance-ready. Activity data such as agricultural inputs, yields, feed composition, energy metering, and logistics routing can become the core of the quantification, with explicit uncertainty management and QA/QC. Developers should assume that corporate buyers will need datasets that can survive external assurance, not just a verification statement.

Commercial “productisation” will matter more because buyers will compare units like procurement items. Developers should be ready to provide unit specifications including vintage, geography, methodology, co-benefits where relevant, permanence and buffer terms for nature-based activities, and a clear mapping to Scope 3 categories such as purchased goods and services or upstream transportation. This is what makes a unit usable inside a buyer’s reporting and claims workflow.

These requirements mean both buyers and developers need to plan now. A practical readiness checklist helps avoid stranded credits and non-compliant claims during the transition.

2026 readiness checklist: timelines, internal governance, and how to avoid stranded credits or non-compliant claims

A realistic 2026 plan should follow Verra’s phased launch. Verra has communicated that Q1 2026 starts with pipeline listing, with later phases moving toward validation, verification, and issuance. Buyers should split procurement into two buckets: pipeline and pilots with clear learning goals, and verified volumes with clear claim use cases, each with milestones and go/no-go gates.

Internal governance should be formalised as a Scope 3 Claims Committee. A practical committee includes Sustainability, Procurement, Legal, Finance or Investor Relations, and Internal Audit, with a written policy that defines allowed claim types, minimum quality criteria aligned to ICVCM and VCMI where relevant, approval rules for external communications, and a process for handling challenges.

Data and supplier readiness should focus on hotspots, not perfection everywhere. The minimum checklist is a hotspot category map, supplier data capture processes, MRV contract templates, and traceability tools that connect interventions to products, periods, and suppliers. The operational target is to move from estimates to verifiable supplier-specific data for the subset of spend or emissions that drives the majority of Scope 3 impact.

Avoiding stranded credits starts with matching the unit to the claim before signing. Buyers should not lock into units that cannot support the intended claim type, and contracts should include clauses on label eligibility, methodology updates, substitution rights, and clear separation between an offset portfolio and a value chain intervention portfolio. Anti-double counting and anti-double claiming controls should be explicit in both policy and contracts, consistent with integrity principles such as those in ICVCM’s framework.

Assurance and auditability should be planned early, not added later. Companies should consider third-party assurance for the Scope 3 inventory and for the claims process itself, not only for the units. The goal is to be ready for scrutiny from B2B customers, rating agencies, and auditors with a complete evidence pack and clear registry retirement traceability.

KPIs should be operational and conservative in 2026. Useful metrics include the share of spend covered by supplier-specific data, the number of suppliers with reduction plans, quantified value chain mitigation with documented evidence, and the share of external claims that are verified or assured. Communication should stay conservative until units are fully verified and the claim logic is proven in practice.