The Sun newspaper claims energy deals offered by Age UK with supplier E.On may have been much more expensive than the cheapest offers from the firm.
In return, the Sun alleged, the charity had received about £6m from E.On.
Age UK has rejected the allegations, while E.On said its tariffs were competitively priced.
The Sun claimed that
Age UK recommended a special rate from E.On which would typically cost
pensioners £1,049 for the year - £245 more than its cheapest rate in
2015.
It also alleged Age UK received about £41 from energy supplier E.On for every person signed up, amounting to £6m a year.
