气候变化已被确定为未来几十年各国、政府、企业和公民面临的最大挑战之一。气候变化对人类和自然系统都有影响，并可能导致资源使用、生产和经济活动的重大变化。作为回应，正在制定和实施国际、区域、国家和地方倡议，以限制地球大气中的温室气体浓度。此类温室气体倡议依赖于温室气体排放量和/或清除量的量化、监测、报告和核查。温室气体确认或核查活动的总体目标是让所有依赖温室气体断言的各方都有信心。做出温室气体断言的一方负责遵守相关标准或温室气体计划的要求。 验证或验证机构负责完成客观评估，并根据证据提供有关责任方温室气体主张的验证或验证声明。本国际标准规定了使用ISO 14064-3或其他相关标准或规范进行温室气体验证或验证的机构的要求。它包含了这些机构应该能够证明的一些原则，并提供了反映这些原则的具体要求。一般要求涉及法律和合同安排、责任、公正性管理、责任和融资等问题。具体要求包括与结构、资源要求和能力、信息和记录管理、验证和核查程序、申诉、投诉和管理系统有关的规定。 本国际标准为温室气体项目管理者、监管机构和认证机构提供了评估和认可验证和验证机构能力的基础。它还可以用于其他方式，例如在验证组或验证机构内部或此类组之间的同行评估中。

Climate change has been identified as one of the greatest challenges facing nations, governments, business and citizens for the coming decades. Climate change has implications for both human and natural systems and could lead to significant changes in resource use, production and economic activity. In response, international, regional, national and local initiatives are being developed and implemented to limit greenhouse gas (GHG) concentrations in the Earth's atmosphere. Such GHG initiatives rely on the quantification, monitoring, reporting and verification of GHG emissions and/or removals.The overall aim of GHG validation or verification activities is to give confidence to all parties that rely upon a GHG assertion. The party making the GHG assertion is responsible for conformity with requirements of the relevant standard or GHG program. The validation or verification body is responsible for completing an objective assessment and providing a validation or verification statement concerning the responsible party's GHG assertion based on evidence. This International Standard provides requirements for bodies that undertake GHG validation or verification using ISO 14064-3 or other relevant standards or specifications. It contains a number of principles that these bodies should be able to demonstrate and provides specific requirements that reflect these principles. General requirements relate to matters such as legal and contractual arrangements, responsibilities, the management of impartiality, and issues of liability and financing. Specific requirements include provisions related to structures, resource requirements and competencies, information and records management, validation and verification processes, appeals, complaints and management systems.This International Standard provides GHG program administrators, regulators, and accreditors with a basis for assessing and recognizing the competence of validation and verification bodies. It can also be used in other ways, such as in peer assessment within groups of validation or of verification bodies or between such groups.