The American Immigration Lawyer Association reminds you a green card lottery scam. An email claiming to come from the U.S. Department of State, saying that “you have been selected as one of the lucky winners” of the DV visa lottery and asking for payment of $749 for singles and $949 for families is not a legitimate notification. The sender is trying to steal your money, and you will not get a visa from it.
A legitimate notification of selection under the DV lottery will come only by mail. It includes a packet of forms for you to complete, and will not ask you for money.