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This guidance document outlines the framework, professional standards, and methodological requirements for Approved Verifiers and External Review Providers conducting certifications under the Climate Bonds Standard v4.2. It details the specific verification processes for Use of Proceeds (UoP), Asset, Entity, and Sustainability-Linked Debt (SLD) certifications, emphasizing independence, science-based criteria, and the role of the Climate Bonds Standard Secretariat in making final certification decisions.

This guide provides the assessment methodology and verification procedures for Approved Verifiers conducting engagements under the Climate Bonds Standard & Certification Scheme. It details the requirements for pre-issuance, post-issuance, and periodic verification, outlining the different levels of assurance (Reasonable, Limited, and Agreed-Upon Procedures) and the specific reporting standards (ISAE 3000 and ISRS 4400) that must be followed to certify that bonds finance projects consistent with a low carbon and climate resilient economy.