Audit and compliance

Why we audit

We have a responsibility to protect public funds by making sure participants comply with the scheme rules. This is why we carry out audits.

Who we audit

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

What does an audit involve?

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

  • A desk audit which involves us asking you to supply certain documents and records.
  • A site audit. We’ll inspect the heating system and also ask to see certain documents and records at the same time. The site visit may be carried out by external auditors.

We ask for your cooperation if you receive an audit request. If you don’t respond to the request, we may have to suspend your payments while we try to make arrangements for auditors to visit.

You can read more about our enforcement powers in Guidance Volume 2, Chapters 13 and 14.

Documents you need to keep

Please read the Easy Guide to Compliance for details of key documents we may ask for, which include:

  • A copy of the Microgeneration Certification Scheme (MCS)open key term pop-up certificate, or certificate from equivalent scheme (if applicable)
  • Purchase receipts for the heating system
  • Fuel receipts or invoices, including evidence of sustainability requirements (if applicable)
  • Heat meter calibration certificates, if applicable
  • Clear fuel records which show the types and volume of fuel used
  • Installation commissioning certificate
  • Installation emissions certificate
  • A record of heat meter readings submitted to Ofgem.

You might also be asked for further evidence.

What is non-compliance?

Non-compliance is an activity which does not comply with the scheme regulations, such as failing to comply with ongoing obligations, using non-compliant equipment or using heat for non-eligible purposes.

We have rigorous systems in place for the prevention, detection and investigation of non-compliance cases.

Reporting non-compliance

If you have any concerns about non-compliance or sanctions imposed relating to non-compliance, or if you have a dispute about this, email

You can also write to us at: Non-Domestic RHI Compliance Team, Ofgem, 10 South Colonnade, Canary Wharf, London, E14 4PU.

If you suspect fraud

We take allegations of fraud very seriously. To find out how to report suspected fraud, and our role in preventing it, please see our section on Counter fraud.

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.

Publications and updates

  • Published: 16th Oct 2015
  • Guidance
  • 0 Associated documents
All participants on the Non-Domestic Renewable Heat Incentive are obliged to keep up-to-date records of fuel use if they are using biomass. These fuel records will also form part of the evidence to show the fuel being used is sustainable.