If paying your bill over the phone, please state you have a prepaid card to pay your energy bills, not a voucher.
Prepaid energy cards are accepted by all major energy providers in the UK.
Due to the number of smaller and independent energy providers in the UK, as well as biomass and oil suppliers, there is a chance that the card will not process because they are not yet set up to accept them.
If your energy prepaid card is not accepted and you know there are sufficient funds on the card to cover the transaction, then please let the Evouchers support team know as soon as possible.
Evouchers support can be contacted here.