@yasiraja1 if the person is present in Pakistan with all paper work record of car arrival, and a Pakistani citizen with a cnic / nicop,
write a letter to collector customs pen down all details including passport number vehicle registration number carnet permit number date & validity ,
the letter shall request for apraisment / valuation of car for payment of customs duty & applicable taxes, walk to the nearest collector customs office submit with copies of mentioned documents make sure you submit it and get the copy stamped received, and wait for a reply. do not forget to mention your address for correspondence, in Pakistan
the letter shall be from person who originally own the car & shall be available in person to persue the case.
-