Sales Practice - Largest Suppliers Bound to the Billing Code

The majority of the largest energy suppliers in the UK have adopted the so-called Billing Code (short for the Code of practice for accurate billing), which covers things such as energy bills, payments, refunds and back billing as well as meter reading and switching. They include:

Other suppliers may follow the Billing Code’s standards as well but unlike the above mentioned energy companies, they are not subject to annual audits.