Validation and Verification Body (VVB)
A juristic person registered by the Board of Directors of TGO to be an external validator/verifier for the Premium T-VER project under the regulations set by TGO. The VVB has the responsibility to validate the voluntary project and verify the amount of GHG emission reductions of the project in accordance with the criteria, procedures and conditions set by TGO.
Validation
a systematic, independent and documented process for the evaluation of a GHG assertion in a GHG project plan and GHG calculation in Project Design Document (PDD) against agreed Premium T-VER project validation criteria and in accordance with ISO 14064-3:2019. Validation is performed by a Validation and Verification Body (VVB). VVB shall issue a validation report after completion of the validation process to certify that the GHG emission reduction project meets the Premium T-VER project registration criteria set by TGO.
Verification
a systematic, independent and documented process for evaluating GHG assertion in GHG Monitoring Report against agreed verification criteria and conformed to ISO 14064-3:2019. VVB shall issue a verification report after completion of the verification process to certify the amount of GHG emission reductions according to the carbon credits certification criteria set by TGO.
A sectoral scopes of accreditation of validation and verification bodies are based on the accreditation scope specified by the Thai Industrial Standards Institute (TISI). The determination of sectoral scopes of accreditation of validation and verification bodies by TISI is referenced from the International Accreditation Forum (IAF) document, namely the IAF Mandatory Document – Application of ISO/IEC 17011 in Greenhouse Gas Validation and Verification (ISO 14065).
The table below provides the list of sectoral scopes

Validator and Verifier Team
Personnel assigned by a validation and verification body to provide an independent opinion on the information provided by the project participant in the Project Design Document (PDD), Monitoring Report, and other relevant documents. Such personnel must possess the knowledge, competence, and skills in accordance with the requirements of ISO 14066:2011 and be sufficient for conducting greenhouse gas validation and verification processes. The validation and verification processes undertaken by the Validator and Verifier Team shall comply with the requirements for greenhouse gas validation and verification under ISO 14064-3:2019 and the greenhouse gas validation and verification guidelines prescribed by TGO.
Validation and verification procedures can be found in the Manual for T-VER Validation & Verification below.
Manual_for_T-VER_Validation_and_Verification_Version_02.pdf


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