I'm with div. Whilst it sounds like a scam. I've known of people using old mail to create electricity accounts and letting it go into default and not paying. I know this because it happened to me. They used my name (even though it was spelt wrong) and a random DOB. It's is why you should ALWAYS have your mail redirected after you move. So I would follow it up with the actual electricity company. Do not use any debt collector website. If it is a scam they can get your details.