Audit-Ready Carbon Report for UK Customers
Audit-Ready Carbon Evidence
A carbon total is easy to copy into a questionnaire. The harder question is what happens when a customer, procurement team, investor or reviewer asks how that number was produced. An evidence-ready submission should make the chain visible: reporting boundary, reporting period, source activity data, emission factor, calculation, scope classification, assumptions and final total.
GreenKPO creates that chain as part of the reporting workflow. Instead of storing the report in one folder and the bills, spreadsheets and calculation notes somewhere else, the evidence remains linked to the figure it supports. That makes customer follow-up, annual updates and internal review substantially easier.
What should a carbon evidence pack contain?
- Reporting entity and organisational boundary
- Reporting period
- Scope 1, Scope 2 and relevant Scope 3 totals
- Activity data used for each material source
- Emission-factor references and factor year
- Calculation methodology and unit conversions
- Estimates, exclusions and data-quality notes
- Source documents or records supporting the activity data
- Reduction actions or targets where the customer specifically asks for them
- A dated output that can be matched back to the underlying dataset
Why evidence matters commercially
Customers are not always asking for independent assurance. Often they simply need enough documentation to trust that a supplier's figures are usable in their own reporting or procurement process. A structured evidence pack reduces follow-up questions and helps the supplier answer consistently across different customer formats.
Measured data, estimates and transparency
Not every emissions category will have perfect activity data. The goal is not to hide that. The goal is to record which values are measured, which are estimated, what method was used, and where the limitation sits. That is more defensible than presenting a single number with no explanation.
How the evidence pack fits the cluster
This page owns the deliverable intent — what a complete evidence pack should contain. If your actual problem is different, these routes may fit better:
- A customer has generally asked for data → Customer requested carbon data
- The specific ask is your company footprint → Customer asking for carbon footprint
- You need to understand a Scope 3 data request → Scope 3 data request from a customer
- You need to know what to send first → What carbon data to send a customer
- The evidence is for a bid or tender → Carbon reporting for UK tenders
- The request arrived through supplier onboarding → Carbon data for supplier onboarding
Common questions
- Is an evidence pack the same as independent verification?
No. An evidence pack organises the source data, calculations and methodology behind the figures. Independent verification or assurance is a separate activity performed by an appropriately qualified third party where required. - Do we need to send customers all of our source documents?
Not necessarily. Provide the level of supporting information the customer legitimately needs, while protecting commercially sensitive information. The important point is that your own internal record remains traceable. - Can the same evidence pack support a tender?
Often yes. A well-structured baseline can support customer questionnaires and tender responses, but always check whether a procurement process specifies a particular template or Carbon Reduction Plan requirement. - What if some Scope 3 data is estimated?
Label it clearly, document the estimation method and update it when better data becomes available. Traceable estimation is preferable to an unexplained figure.
Build the evidence chain behind your carbon numbers
Keep boundary, activity data, factors, methodology and source records linked to every figure — ready for a customer, auditor or reviewer to check.