Aardvark Certification is a provider of assurance engagements and certification services in the renewable energy and waste sectors. 

We specialise in providing sustainability audit reports and independent assurance reports to enable operators of renewable energy generating stations to comply with the Sustainability Criteria. We offer sustainability audits for operators of biomass, biogas and bioliquid fuelled plants.

Our experienced auditors can help you comply with the Sustainability Criteria under the Renewables Obligation (RO), Renewable Heat Incentive (RHI) and Feed in Tariff (FiT) schemes.

Further Information for the RO scheme can be found here.

Further information for the RHI scheme can be found here.

Further information for the FiT scheme can be found here.

What do I need to know about the Ofgem Sustainability Audit and Annual Report?

  • Its purpose is to provide annual independent assurances to Ofgem that the sustainability criteria have been met.

  • The audit report must be conducted and compiled by an independent audit company and verify if sustainability information reported to Ofgem are accurate.

  • The audit should verify that the generating station is adhering to their procedures as stated in the Fuel Measurement and Sampling (FMS) procedures.

  • The actual Ofgem sustainability criteria are laid down in the legislative documents for each of the renewable energy subsidy schemes to which they apply and Ofgem guidance.


We will ensure your sustainability audit and report is created in accordance with the International Standard on Assurance Engagements (ISAE) 3000. The Renewables Obligation specifies points that must be addressed as part of the audit process which include the need for the auditor to consider:

  • Whether the systems used to produce the relevant sustainability information are likely to produce information that is reasonably accurate and reliable

  • Whether there are controls in place to help protect the relevant sustainability information against material misstatements due to fraud or error

  • The frequency and methodology of any sampling carried out for the purpose of obtaining or checking the data on which the operator relied in preparing the relevant sustainability information

  • The robustness of the data on which the relevant sustainability information was produced

Aardvark Certification Ltd applies International Standard on Quality Control 1 (ISQC 1) and accordingly maintains a comprehensive system of quality control including documented policies and procedures regarding compliance with ethical requirements, professional standards and applicable legal and regulatory requirements.

All of our assurance reports are prepared in compliance with the independence and other ethical requirements of the Code of Ethics for Professional Accountants issued by the International Ethics Standards Board for Accountants.

We can do this because we are independent, impartial and trusted.