The Diversity Immigrant Visa program, also known as the green card lottery, is a United States congressionally mandated lottery program for receiving a United States Permanent Resident Card. The Immigration Act of 1990 established the current and permanent Diversity Visa (DV) program. The lottery is administered by the Department of State and conducted under the Immigration and Nationality Act (INA) as amended by the Immigration Act of 1990.
There is only one official web service which is governmental and provides the diversity green card lottery. Nowhere else you can register officially. Use only this site to join the diversity green card lottery. The open period for the green card diversity will be open at a specific time. During this period you will be able to upload your data to the official application online form and that would mean you are in the system for the chance to win your diversity green card.
As soon as the time come to register don’t wait too long. The first applications in the system have more chances for the win.