Audit checks

Mae’r dudalen yma ar gael yn Gymraeg.

Why we audit

We pay out public money so we need to make sure it's being spent properly and people are following the rules. Audit checks are one way to do this. They also help us identify and protect against errors and fraud.

Anyone can be selected for an audit check at any time. We select heating systems based on a number of reasons including random sampling.

What does an audit check involve?

There are two different types of audit and your heating system could be selected for either:

Pre-accreditation audits

Where we audit your application before it’s accredited. This could involve us asking you for certain documents or inspecting your heating system to verify its eligibility. 

Post accreditation audits

1. A desk audit, which involves us asking you to supply certain documents and records.

2. A site audit, which is done onsite where we need to inspect the heating system and also see certain documents and records. It's carried out by external auditors. Owner-occupiers need to submit a declaration confirming that you permit us to access the site to inspect the heating system. Landlords need to submit a declaration confirming the tenant of the property permits access for inspection.

If we don’t have your cooperation, we may suspend your payments.

Documents you need to keep

You might also be asked for further evidence - for example, photographic evidence for the heating system or meter, copies of utility bills, copies of correspondence for grant funding and a copy of the metering for payment checklist that your installer gives you, if your heating system is metered.


We take a zero tolerance approach to fraud and have a dedicated Counter Fraud Team to detect, prevent and deter it. Examples of dishonesty to make a financial gain from the scheme include:

  • intentionally not reporting a change in your circumstances
  • applicants or other individuals within the supply chain submitting false or misleading documents to gain access to the scheme, or to increase payments due from the scheme.

Where we identify suspected fraud or unethical practices, we’ll refer the individuals in question to the relevant authorities which may include Action Fraud, the Police or Trading Standards.

If you have concerns about suspected fraud, please report it to us:

0207 901 7373, 9am-5pm, Monday to Friday

For further information, visit our Counter Fraud web page.

Next steps

To find out more, see:

To log in to MyRHI:

Microgeneration Certification Scheme (MCS)

All renewable heating systems in the Domestic RHI must be certified by MCS. This is an internationally recognised quality assurance scheme supported by government. You’ll need an MCS certificate number to support your application. More.

Energy Performance Certificate (EPC)

This is a report that assesses the energy efficiency of a property and recommends how it can improve. It’s the proof we need that your property is a ‘dwelling’. More.