Sustainability Report Assurance
AA1000AS Licensed Assurance Provider

Sustainability Report Assurance

External Assurance

External assurance refers to seeking an independent evaluation of performance data published in sustainability reporting. Reporting organisations seek external assurance from licensed assurance providers to improve the credibility of their sustainability reports. Robust external assurance provides enhanced confidence in the quality, reliability and accuracy of an organisation’s sustainability data. The external assurance process also helps organisations to improve their reporting processes, data management and accountability which in turn boosts sustainability performance.

Benefits of External Assurance

Obtaining external assurance for sustainability reporting has a host of benefits that include:
• Enhanced credibility sustainability reporting
• Improved quality, reliability and accuracy of performance data
• Reduced risk and increased value
• Improved Board and CEO level engagement
• Improved management systems, reporting process and accountability
• More effective stakeholder communication

Our Assurance Services

CSRWorks is a Licensed AA1000AS Assurance Provider. We provide independent third-party assurance of sustainability reports that includes verification of sustainability data and conformance with the GRI Standards.
Our assurance engagement covers:
• Pre-Assurance
• Assurance

Assurance Standards

We use the GRI Standards, AA1000 Assurance Standard and ISAE3000 to provide external assurance for sustainability reports.

Assurance Statement

We provide an Assurance Statement in accordance with the AA1000AS at the end of the engagement process. You can include the Assurance Statement in your sustainability report.

Besides, we provide a comprehensive audit report outlining findings and recommended improvements in reporting, data collection process and systems.

Our Methodology

Our assessment methodology goes beyond mere verification of data, to evaluate the underlying sustainability management system and processes for reporting performance.

Our Assurance Team

Our assurance team has extensive international experience in sustainability reporting and sustainability assessment. With in-depth knowledge in AA1000AS, ISAE3000, GRI Standards, the International Integrated Reporting Framework, DJSI, CDP, UNGC, GHG Protocol, Environmental Management System (EMS), Occupational Health and Safety Management System, EcoVadis and a host of national and international reporting frameworks, our team of assessors practices high standards of professionalism, ethics and integrity.

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Internal Review Services

CSRWorks offers Internal Review services for sustainability reporting. We conduct Internal Reviews of sustainability reporting in accordance with the International Standards for the Professional Practice of Internal Auditors issued by the Institute of Internal Auditors. We combine our extensive sustainability expertise and audit skills to provide a robust Internal Review of sustainability reporting and support the internal audit function.

Benefits of Internal Review

• A systematic Internal Review of sustainability reports increase stakeholder confidence in the accuracy and reliability of the sustainability information disclosed.
• Internal Review ensures reasonable verification of performance data’s reliability, quality, and accuracy.
• It improves sustainability risk management and internal controls.
• It improves sustainability brand value, avoiding accusations of greenwashing.
• It improves Board engagement.
• It improves the sustainability management system, the reporting process and management accountability.

Why CSRWorks

CSRWorks International is a trusted name in sustainability services, training and thought leadership. As a licensed AA1000 Assurance Provider, CSRWorks offered third-party external assurance services for sustainability reporting and ESG disclosures. We also provide Internal Review services for sustainability reporting. CSRWorks is a member of The Institute of Internal Auditors, Singapore.

CSRWorks has extensive sustainability expertise with a proven track record since 2005. Our services include sustainability reporting, external assurance, internal review, sustainability strategy, TCFD reporting, carbon emissions measurement and reporting and ESG ratings.

CSRWorks is GRI’s Global Certified Training Partner and conducts GRI Standards training worldwide. Also, CSRWorks is an IFRS-approved Integrated Reporting Training Partner to develop and provide integrated reporting training internationally. CSRWorks offers a wide range of ESG rating advisory services, including CDP, EcoVadis, the Corporate Sustainability Assessment (CSA), FTSE4Good, MSCI, Sustainalytics and more.

Our thought leadership projects comprise the Asia Sustainability Reporting Awards, Asia Integrated Reporting Awards, Asia Sustainability Reporting Summit, and Asia’s Top Sustainability Superwomen.


To learn more about our sustainability report assurance services, please write to

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CSRWorks International Pte Ltd

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