Overnite Express — Loss of Cheque

Cheque no. 772115 for Rs. 95805.99 was dispatched through overnite express vide AWB no. [protected] by Maxlite on 15.01.2013 was misplaced by overnite. After numerous calls they are saying thay they delivered it on 17.01.2013 to some P.Paul (no such person exists in our home let alone our whole flat). How could they deliver such an important document to just about anyone??? They should be made liable for misplacing it and doing everything possible to get it back. Ur help in this regard would be highly appreciated