Methodology, portfolio policy and project factsheets
The documents behind every result and every tonne: the calculation method, the rules for the credits we sell, and one page per project. Free to read, download and share.
- Open PDF: Methodology whitepaper
Methodology whitepaper
How the calculators turn your activities into kg CO₂e: the formula, the emission factors and their sources, the boundaries and the uncertainty of every result.
Version 1.0 · 28 September 2026 · 15 pages · PDF, 602 KB
- Open PDF: Portfolio and credit-quality policy
Portfolio and credit-quality policy
Which credits Coffset sells and how they are chosen and retired: eligibility criteria, concentration limits, reversal risk and what we publish.
Version 1.0 · 28 September 2026 · 12 pages · PDF, 440 KB
- Open PDF: Project factsheets
Project factsheets
One page per project in the portfolio: what it does, where it is, how it is certified and the risks to know, with the registry ID where confirmed.
Data as of 28 September 2026 · 24 pages · PDF, 255 KB
What you receive after a purchase
A public certificate with your name, the amount, the projects your credits came from and a link to the registry records.
See a sample certificateOn the website
Questions or corrections? Write to [Email]