Once your ticket is purchased, scanned and uploaded into your account that ticket is yours. Legally and in every other sense possible. The same questions always pop up at this stage of the explanation to new time online lottery players and these doubts can be best explained in further detail in the article on the Iraqi Lottery winner but the gist of it is as follows: 
Before the agreement, the only places that sold both Mega Millions and Powerball tickets were retailers straddling a border; one retailer on the Sharon, Pennsylvania/Masury, Ohio border sold both Mega Millions (via the Ohio Lottery) and Powerball (Pennsylvania) before the agreement and continued to be the only retailer to sell tickets for both lotteries.[12]
In the United States, lotteries are run by 47 jurisdictions: 44 states plus the District of Columbia, Puerto Rico, and the U.S. Virgin Islands. Lotteries are subject to the laws of and operated independently by each jurisdiction, and there is no national lottery organization. However, consortiums of state lotteries jointly organize games spanning larger geographical footprints, which in turn, carry larger jackpots. Two major lottery games, Mega Millions and Powerball, are both offered in nearly all jurisdictions that operate lotteries, and serve as de facto national lotteries.
In the United States, lotteries are run by 47 jurisdictions: 44 states plus the District of Columbia, Puerto Rico, and the U.S. Virgin Islands. Lotteries are subject to the laws of and operated independently by each jurisdiction, and there is no national lottery organization. However, consortiums of state lotteries jointly organize games spanning larger geographical footprints, which in turn, carry larger jackpots. Two major lottery games, Mega Millions and Powerball, are both offered in nearly all jurisdictions that operate lotteries, and serve as de facto national lotteries.

Jump up ^ "Mega Millions jackpot reaches record $500 million". Komo News. Sinclair Interactive Media. March 28, 2012. Retrieved September 4, 2013. The jackpot was originally announced at $476 million early Wednesday morning but rampant ticket sales boosted the estimated payout to the $500 million mark. Tuesday night's jackpot was $363 million, fed by weeks of drawings without a top winner. It has rolled 18 times since Marcia Adams of College Park won $72 million in the Jan. 24 drawing. A winner could get $19.2 million a year for 26 years or a single payment of $359 million. The previous record jackpot in the Mega Millions game was $390 million in 2007, split by two winners in New Jersey and Georgia.
With an impressive $40,000,000 starting jackpot, US Powerball offers the biggest starting jackpot of any world lottery, and its $1.58 billion personal best from January 2016 is the all-time lottery world record! Match all five main numbers and the Powerball and you could be celebrating a multi-million dollar win in America’s favourite lotto! When you play Powerball online, in addition to the jackpot you can win one of eight exciting secondary prizes including a second prize that starts at $1 million!
The US Powerball is a standard lottery draw game based and operated from the golden State of California. The US Powerball has been making millionaires and multi-millionaires since its first drawing way back in 1992. With over 25 years of experience in the lottery industry, the Powerball, along with many other State lotteries, has broken through the final glass ceiling and transformed itself from an interstate lottery into a truly international lottery of global reach. 
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