Martin Lewis urged households to check if their energy credit for bills as some may be due a refund worth hundreds.
In the recent Money Saving Expert (MSE) newsletter, Martin said it was the "perfect time" to check the level of energy credit on your energy account if you pay by direct debit.
Around 65% of us pay our energy bills by direct debit and energy companies are believed to be sitting on around £7billion of cash which is sat purely in credit.