You do not have to be a U.S. citizen or U.S. resident to play Powerball®. Players from jurisdictions where Powerball tickets are not sold, either in the United States or outside the country, can purchase Powerball tickets from a retailer licensed or authorized by the selling jurisdiction, if they meet the legal age requirement in the jurisdiction of purchase. Federal and jurisdictional income taxes may apply to any claimed prize money.
Enrollment into this years USA Diversity Visa Green Card Lottery program is open to all individuals world-wide, who meet the two entry requirements specified below. If you meet these two entry requirements, you can enter the USA Green Card lottery here: Register for the DV-2020 Lottery. Note: This years lottery is called the DV-2020 Lottery, where 2020 means the year where successful applicants can enter the United States of America in January, 2020 after they have won a permanent resident card in the lottery, submitted their immigration forms and participated in a successful green card interview at the Embassy closest to where they live.
Powerball is an American lottery game offered by 44 states, the District of Columbia, Puerto Rico and the US Virgin Islands. It is coordinated by the Multi-State Lottery Association (MUSL), a nonprofit organization formed by an agreement with US lotteries. Powerball's minimum advertised jackpot is $40 million (annuity); Powerball's annuity is paid in 30 graduated installments or winners may choose a lump sum payment instead. One lump sum payment will be less than the total of the 30 annual payments because of the time value of money.
Mega Millions' second-largest jackpot, $648 million, was for the December 17, 2013 drawing. Two winning tickets, one each from California and Georgia, were sold. The holder of the Georgia ticket claimed the next morning; they selected the cash option, which amounted to $173,819,742.50 before withholdings. The holder of the California ticket claimed on January 3, 2014. (The California ticket holder received an equal share, but potentially a larger cash-option amount, as California lottery winnings are exempt from state income tax)." 
The only way to be sure that what you are buying is “official” is to purchase your tickets from a company that has agents that will purchase in the real world the Powerball tickets online that you have selected. If you are a more trustworthy person and don’t need a scanned copy of your Powerball tickets online then by all means go for an online lottery ticket provider that follows the insurance model.
If you’re not using an official state lottery website, the retailer may not be licensed and therefore could have no connection to the state lottery programs. Last year, during the record-breaking $1.6 billion Powerball jackpot, Holyfield says Michigan’s lottery office fielded several calls from consumers who purchased tickets online, only to have the vendor shut down without notice.
The structure of the draw is one which regular lottery players will be very familiar with; players must pick 5 regular numbers from a pool with a total of 69 numbers and in addition to these regular number picks, you also choose one bonus ball (known as the Powerball) from a pool of 26. These two pools of numbers are mutually exclusive and remain completely separate throughout the drawing procedure. In order to jackpot the US Powerball, you need to match all 5 regular numbers and the Powerball. Do this and you are instant Powerball millionaire – it’s as simple as that!