Hi SMHarman, just seen your comment, When you get 'doorstep collection' they still have to abide by the law, and some of these evil doorstep collectors, can be exrtremely nasty, with threats of every nature, a county court official will have proper ID, and still you can still stop him entering your property WITHOUT a court order, in this day and age, county court actions, are that they can be dealt with, without problems, but if you get DC's, they will take court action, over nothing, as they get the money from you.
Under the Harrassement Act, you are not allowed to be pestered by people, unless it has been dealt with by a court of law.