So I've just checked my emails and there is one from a debt collector agency, it's for electricity. There's a site to go to and use a ref number to log in, so I've done that but the address for the bill is our house we sold in the first half of 07 so 6 years ago? And even stranger is the billing date or maybe when it was transferred to the collection place is 2011.

This is the first I've ever heard about us owing them money, I don't think we do?

So what do I do? Do I call them?