Energy supplier E.ON plans to stop selling electricity and gas to customers in shopping centres or at events.
The firm said this is in response to the “changing way” customers want to interact with their energy company.
Up to 450 sales and sales support jobs are potentially affected.
Instead it seems likely to shift towards relying more on call centres and the internet for any contact with customers.
Tony Cocker, Chief Executive of E.ON UK said: “This is not a move we have taken lightly.
“It’s become increasingly clear that many of our customers want to contact us either online or over the phone, when seeking a new energy supplier. We need to respond to what our customers want and where we can we will.”