Maruti Suzuki — winning cash award

I got a message last week telling i had won the cash award and to send my name, address, mobile no and the occupation to their mail. I had already sent my above details to their mail id.. and i got a mail which give all the information regarding the winning of cash price but they told us to pay the custom charges in Indian custom authority for the shipment and deliver the award to me. Is the message fake or not ?? Please i need a reply