Thank you for the quick reply. It's so long ago I honestly can't remember and no longer have anything from that account. And nope - I've not heard anything about it for years!

Hello, This is my first post so apologies if it's not to the right place. I've spent a bit of time trying to look at other posts and in the library, but am still struggling to get my head around what I am meant to do. I used to have a Nationwide bank account which was about £300 overdrawn. This was closed about 7/8 years ago and I made repayments (or so I thought). Then out of the blue I get a letter from Nationwide saying that they have sold a debt of £440.07 to Aktiv Kapital Portfolio AS, Oslo, Zug Branch. I was surprised by this firstly because I thought I had paid it back and secondly this is more than the debt was to start with. Shortly after I get a letter from Aktiv Kapital demanding repayment, followed by many more letters. In my confusion I paid a one off £10 through their website which I probably shouldn't have done but just did it to put off the letters. I've now been receiving lots of letters and phone calls from Credit Security Limited on their behalf. So what should I be doing next? I'm not entirely sure that I owe anything , and if I do I don't see how it can be that much. I had a look in the library. Am I meant to send a CCA letter like this one? Or the general debt letter? Or something else entirely?? My mind is boggled so any help would be much appreciated!