Delhi Traffic Police — vehicle rc no. dl3sbq7148

Address:

New Delhi, Delhi, 110025

Dear sir, i have sold this scootty to one mr. Kishan taneja of arc motors, s-9, okhla phase-ii, new delhi on 26/10/2016.
But unfortunately, i have received three challans by post from traffic police some where in may 2018. I have informed the buyer about the challan and told him to make the payment and transfer the vehicle to his name. He told me that the ownership is already changed to the new owner and promised me that he will make the payment of the challan.
I wrote to the same issue to the traffic police and gave the new owners address. But to my dismay, today i received a notice from the court asking me to be present there for the same challan.

Kindly help me why this challan is coming to me even though the ownership has been changed to the new owner.