Supplier Carbon Disclosure Questionnaire Review Checklist [FREE PDF]

Supplier carbon disclosure reviews are a critical mechanism for organizations to obtain credible Scope 3 Category 1 (purchased goods and services) emissions data, as required by the GHG Protocol Corporate Value Chain (Scope 3) Standard and SBTi supplier engagement targets. CDP Supply Chain Program responses must be rigorously evaluated to ensure data quality, methodology consistency, and alignment with ISO 14064-1:2018 verification requirements. This checklist enables Carbon Analysts to systemat

  • Industry: All Industries
  • Frequency: Per Event
  • Estimated Time: 30-45 minutes
  • Role: Carbon Analyst
  • Total Items: 35
  • Compliance: GHG Protocol Corporate Value Chain (Scope 3) Standard (2011), ISO 14064-1:2018 GHG Accounting and Verification, CDP Supply Chain Questionnaire (2024), Science Based Targets SBTi Corporate Manual v2.0, EPA 40 CFR Part 98 Mandatory Greenhouse Gas Reporting

Disclosure Completeness Assessment

Verify that the supplier has submitted a complete and structured carbon disclosure covering all required sections.

  • Has the supplier submitted a full CDP Supply Chain or equivalent carbon disclosure questionnaire for the reporting year?
  • Does the supplier's disclosure cover all three GHG scopes (Scope 1, Scope 2, and material Scope 3 categories)?
  • Has the supplier disclosed the GHG accounting methodology and emission factor sources used in their inventory?
  • Does the disclosure include the supplier's organizational and operational boundaries?
  • Has the supplier provided contact information for a responsible individual accountable for the disclosed data?

GHG Inventory Data Quality

Evaluate the accuracy, consistency, and credibility of the supplier's reported GHG inventory figures.

  • Are the supplier's Scope 1 emissions calculated using recognized methodologies (EPA 40 CFR Part 98, IPCC, or equivalent)?
  • What is the supplier's total reported Scope 1 emissions for the disclosure year (tCO2e)?
  • What is the supplier's total reported Scope 2 emissions (market-based) for the disclosure year (tCO2e)?
  • Are the GWP values used by the supplier consistent with IPCC AR5 or AR6 as required by your organization's Scope 3 accounting policy?
  • Does the supplier's Scope 1 and 2 intensity trend show improvement (reduction) compared to the prior year's disclosure?

Third-Party Verification & Assurance

Confirm whether the supplier's GHG data has been independently verified and to what level of assurance.

  • Has the supplier's GHG inventory been independently verified by a third party for the disclosure year?
  • What level of assurance has the supplier obtained for their verified GHG data?
  • Has the supplier provided a copy of the verification statement or assurance report with their disclosure?
  • Is the verifier organization accredited and independent from the supplier?
  • Were any material errors or misstatements identified by the verifier, and if so, have they been corrected in the final disclosure?

Supplier GHG Reduction Targets & Commitments

Evaluate whether the supplier has set credible, science-aligned GHG reduction targets.

  • Has the supplier set a publicly disclosed GHG reduction target with a specific base year and target year?
  • Is the supplier's GHG target validated by the Science Based Targets initiative (SBTi)?
  • Does the supplier's target cover Scope 3 emissions if Scope 3 represents more than 40% of their total footprint?
  • Has the supplier reported quantitative progress against their reduction target in the current disclosure?
  • Is the supplier on track to meet their stated reduction target based on disclosed performance data?

Product & Service Level Carbon Data

Assess the availability and quality of product-level carbon footprint data for Scope 3 Category 1 calculations.

  • Has the supplier provided product-level or service-level carbon footprint data (PCF) for products supplied to your organization?
  • Does the supplier's product carbon footprint methodology conform to ISO 14067:2018 or equivalent PCF standard?
  • Are system boundaries for the supplier's PCF data (cradle-to-gate) clearly defined and consistent with your Scope 3 Category 1 accounting needs?
  • Is the supplier's product-level carbon data recent enough (within 3 years) to be used in the current Scope 3 inventory?
  • If product-level data is unavailable, has an alternative calculation method (spend-based or average data) been applied and documented?

Supplier Climate Risk & Governance

Review the supplier's climate governance, risk management processes, and TCFD alignment.

  • Does the supplier disclose board-level or senior management accountability for climate change management?
  • Has the supplier conducted a climate-related risk and opportunity assessment aligned with TCFD recommendations?
  • Does the supplier have a documented climate transition plan outlining how they will achieve their reduction targets?
  • Does the supplier's climate disclosure reference any mandatory regulatory reporting obligations (e.g., EU ETS, EPA 40 CFR Part 98)?
  • Is the supplier's carbon disclosure publicly available, enabling independent verification of the disclosed figures?

Disclosure Quality Scoring & Remediation

Record the overall assessment score, data acceptance decision, and any supplier remediation actions required.

  • What is the supplier's latest CDP Supply Chain score or equivalent disclosure rating?
  • Is the supplier's disclosed GHG data accepted as primary data for inclusion in the Scope 3 Category 1 inventory?
  • Have specific data gaps or deficiencies been documented and communicated to the supplier for next disclosure cycle?
  • Has a remediation or capacity-building action been assigned to the supplier if disclosure quality is below threshold?
  • Please provide a summary of the overall disclosure quality assessment and key findings for this supplier.

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Why Use This Supplier Carbon Disclosure Questionnaire Review Checklist [FREE PDF]?

This supplier carbon disclosure questionnaire review checklist [free pdf] helps all industries teams maintain compliance and operational excellence. Designed for carbon analyst professionals, this checklist covers 35 critical inspection points across 7 sections. Recommended frequency: per event.

Ensures compliance with GHG Protocol Corporate Value Chain (Scope 3) Standard (2011), ISO 14064-1:2018 GHG Accounting and Verification, CDP Supply Chain Questionnaire (2024), Science Based Targets SBTi Corporate Manual v2.0, EPA 40 CFR Part 98 Mandatory Greenhouse Gas Reporting. Regulatory-aligned for audit readiness and inspection documentation.

Frequently Asked Questions

What does the Supplier Carbon Disclosure Questionnaire Review Checklist [FREE PDF] cover?

This checklist covers 35 inspection items across 7 sections: Disclosure Completeness Assessment, GHG Inventory Data Quality, Third-Party Verification & Assurance, Supplier GHG Reduction Targets & Commitments, Product & Service Level Carbon Data, Supplier Climate Risk & Governance, Disclosure Quality Scoring & Remediation. It is designed for all industries operations and compliance.

How often should this checklist be completed?

This checklist should be completed per event. Each completion takes approximately 30-45 minutes.

Who should use this Supplier Carbon Disclosure Questionnaire Review Checklist [FREE PDF]?

This checklist is designed for Carbon Analyst professionals in the all industries industry. It can be used for self-assessments, team audits, and regulatory compliance documentation.

Can I download this checklist as a PDF?

Yes, this checklist is available as a free PDF download. You can also use it digitally in the POPProbe mobile app for real-time data capture, photo documentation, and automatic reporting.

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