Energy certificate

A certificate may be in any form, including electronic, and lists attributes such as method, quality, compliance, and tracking.

Electricity producers, suppliers, or consumers use these certificates when required to use a specific type of energy or to qualify for financial support.

The Climate Change Levy is a notable exception; the regulator issues LECs to electricity producers in the United Kingdom and several European countries that export to the UK.

The European Union create internationally transferable "guarantees of origin:" It provides proof to consumers of the source of their electricity, as required by Directive 2009/72/EC.

Governments use them to calculate the residual mix—the blend of electricity sources produced in a country, adjusted for imports and exports.