Hi, I got one of their letters today and googled them, ended up here. Never had a bad debt and never heard of the company they are colelcting on behalf of. I tried calling before reading the threads but they must have gone home for the night. I dont think replying by post will help, wont it only make them more determined knowing that the recipient has responded? They sent a business reply envelope, so maybe send them a brick back by return post? Any thoughts?