ScottishPower has apologised unreservedly to customers affected by misselling by doorstep and telesales agents.
ScottishPower's chief executive of energy retail and generation, Neil Clitheroe, said he was "happy that this matter has now been concluded".
Mr Clitheroe said in a statement: "I am pleased that Ofgem has made it clear that they found no evidence of a strategy by ScottishPower to deliberately missell to customers.”
More top news
The returns of Benedict Cumberbatch's detective and the X Factor judge were among 2014's most tweeted TV moments in a billion conversations.
A family has issued an appeal to help find their missing pet turkey - in case he gets gobbled up as someone's Christmas dinner.
The winner of X-Factor Ben Haenow has revealed how keen he is to have the Christmas number one.