ACR requires independent third-party validation and verification of all GHG projects following the ACR Validation and Verification Standard, which details ACR’s third-party validation and verification requirements that every GHG project must undergo in order for ACR to register GHG emission reductions and removals as carbon credits.

ACR is developing an updated version 2.0 of the ACR Validation and Verification Standard to align with the most recent versions of the ACR Standard and ISO standards and to provide greater clarity to ACR Validation and Verification Bodies (VVBs) and project developers. A public comment draft is expected to be released in August of 2023. In addition to the ACR Validation and Verification Standard, VVBs should refer to the ACR webpage for Validation and Verification for forms, templates and general information on the process.