An Issuing Body is the body that is appointed by government or by industry to take responsibility for ensuring that certificates provide unique and reliable evidence of the source of energy, enabling them to be transferred between market parties, and regulating the way in which they are used.

They do this by:

1. Ensuring the technology used by participating plant are properly identified and recorded, along with any changes, and that only properly registered plant are permitted to participate.
2. Recording the amount of fuel consumed and energy generated by participating plant, and confirming that this is both accurate and reasonable.
   
3. Recording details of plant and certificates in a registry.
4. Transferring certificates between accounts on instruction from certificate-holders, including transferring them into cancellation accounts as proof that the associated energy has been consumed.
5. Preventing the transfer of certificates that have been placed into cancellation accounts.