I have participated in Readers digest Rs 1 crore sweepstakers.I have got a final call but that requires a silver coin steeker which is missing in my envelop .Please let me know what i have to do.

i have received 3 sample checks with 2600000, 8200000, 5000000& soo on, from reader digest along with car prize to attached on 05/01/2010 .it should be reply with in 72hrs, deadline opf 2 weeks, shall i reply for it?