Amitabh Bachchan today said he did not enter into any contract with Doordarshan to endorse its channel DD Kisan. Bachchan said that his campaign for the new channel was "pro bono" and happened many days ago. <br/><br/>He said in a statement issued in Mumbai that he neither entered into any contract with Doordarshan, for DD Kisan, nor he received any money from them. There were reports that Bachchan was roped in for Rs 6.31 crore in the most expensive endorsement deal ever by an actor.