If they want a box back , now I have two boxes , What they wanted for replacing the old box ( DT-9001 ) with the new box ( DT - 5002 ) was just the card. The new box has no card slot I guess and therefor they enter the card-number / member-number electronically into the new box.
As I got the box from Gary , I think that someone must have been the owner of this box and Digiturk has not wanted it back.