Don't do it - it's a Jamaican scammer.  Please read this FTC notice about Project JOLT:

http://www.ftc.gov/bcp/edu/pubs/consumer/alerts/alt148.shtm

Hey im jasmine berry and im 18 years old i am in college billy johnson called me and said i won 1.8million and a peral white mercadez benz and i needed two types of id a debit card with my name on it and i had to purchase a $250 pre-paid Greendot Moneypack scratch card and they would show up to my house with the prize then he told me i had to pay another 250 and then they would show up.