The regulator has said it will take legal action against any supplier that forces customers onto a prepayment meter and the government is issuing firms with a “cease and desist” order.
It comes as courts are overwhelmed with warrant requests from suppliers – despite rules in place to stop forced switches.
How do prepayment meters work?
Prepayment meters are pay-as-you go gas and electricity meters. They can be topped up online or with a card at certain shops and post offices.