Thousands of British households risk missing out on £400 to assist with energy bills as the deadline to redeem vouchers looms.
The support programme was paid in monthly instalments for those using prepayment meters.
Vouchers of £66 were dished out in October and November.
Eligible Britons could claim £67 between December and March.
An EON prepayment card
More than £130million worth of support remains unclaimed and Britons are being encouraged to take action before it is too late.
Energy Consumers Minister Amanda Solloway said: “We've made huge strides in getting nearly £650million from our energy bills support scheme out to prepayment meter customers, often in the homes that need it most.
“Today we are redoubling our efforts to reach anyone who still hasn’t claimed this help, and it's fantastic to see so many join our final push to spread the word.
“Tell friends and family or anyone on a traditional prepayment meter to use their vouchers for up to £400 off bills before June 30 – there is still £130million out there to claim.”
Amanda Solloway MP (right) with Transport Secretary Mark Harper (left)
The Government has also put millions of Britons on its cost-of-living scheme worth up to £1,350.
Customers tend to have three months to redeem the values before the expiration date.
To do so, customers should pop into a Post Office branch with their voucher, top-up key and proof of address.
Customers can also get unredeemed vouchers reissued for free, provided they are redeemed by June 30.
A smart meter next to an energy bill
Britons with traditional prepayment meters should have been sent energy bill discounts or special action messages via text, email or post.
Bulb, EON, EON Next, EDF, Octopus, Ovo, Scottish Power Shell Energy, Utilita and Utility Warehouse can choose whether to redeem the vouchers on gas or electric meters.
British Gas customers can only redeem discount vouchers on electricity meters.