It seems all fraudsters need is your email address and name to rack up considerable debt in your name. I have never and will never use Klarna. Yet they have been chasing me for over £500 for some time. Despite describing this clear fraud to them and them saying it looked like fraud and they would investigate, they have now sold my debt to a new debt collection agency without any contact with me. This has considerably lowered my credit score at the worst possible time for something I have had little to no involvement in!
