Unclaimed prizes are kept by the lottery jurisdiction. If a Grand Prize goes unclaimed, the money must be returned to all lotteries in proportion to their sales for the draw run. The lotteries then distribute the money, based on their own jurisdiction's laws, to other lottery games or to their jurisdiction's general fund, or otherwise as required by law.

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 are a EuroMillions or Powerball player then you've likely experienced the frustration of never quite matching the winning numbers. EuroMillions was designed to pay out big jackpots but your chances of winning are extremely small. In contrast, the EuroJackpot lottery is designed to give more players the chance to win. Although the prizes are smaller than EuroMillions, jackpots are won far more frequently and you are nearly twice as likely to win betting with EuroJackpot!
1:09 am – Mega Millions: There were no jackpot winners and no $1,000,000 winners in the Tuesday, October 2, 2018 Mega Millions drawing.  For the complete rundown of winners in each of the other prize categories, a list of the California pari-mutuel prize amounts, the drawing video, and all other data about this drawing, see the Mega Millions Drawing Detail page.
The lottery never paid out, and it brought to light the prevalent issue of crookedness amongst the lotteries in the United States. The wave of anti-lottery protests finally broke through when, by 1860, all states had prohibited lotteries except Delaware, Missouri, and Kentucky. The scarcity of lotteries in the United States meant that tickets were shipped across the country and eventually led to the creation of illegal lotteries. In 1868, after years of illegal operation, the Louisiana Lottery Company obtained a 25-year charter for its state lottery system. The charter was passed by the Legislature due to immense bribing from a criminal syndicate in New York. The Louisiana Lottery Company was a derived 90% of its revenue from tickets sold across state borders. These continued issues of corruption led to the complete prohibition of lotteries in the United States by 1895. It was discovered that the promoters of the Louisiana Lottery Company had accrued immense sums of money from illegitimate sources and that the Legislature was riddled with bribery.
Through 2008, Powerball drawings usually were held at Screenscape Studios in West Des Moines, Iowa. The drawings' host was longtime Iowa radio personality Mike Pace, who had hosted MUSL drawings since Lotto America began in 1988. In 1996, Powerball went "on the road" for the first time, holding five remote drawings at the Summer Olympics in Atlanta. A few weeks later, Georgia became the only jurisdiction to leave Powerball (Maine, which joined MUSL in 1990, left when Powerball began). In August 1996, Georgia joined the then-new The Big Game, then the other major U.S. lottery group. It planned to sell tickets for both games for the rest of 1996; but within days Georgia was removed from MUSL, not to return until the 2010 cross-sell expansion.

The largest Mega Millions jackpot, advertised as $640 million at the time of the drawing (annuitized) or $462 million (cash value), was drawn on March 30, 2012. The initial estimate for that drawing (following the March 27 drawing, which was $363 million annuity) was $476 million (later increased to $500 million and again to $540 million); brisk ticket sales pushed the jackpot values, both annuitized (to $656 million) and the cash option ($474 million) higher. The amount spent on Mega Millions for drawings following its previous jackpot win, on January 24, 2012, was at least $1.5 billion.[13] three jackpot-winning tickets had been confirmed (Illinois, Kansas, and Maryland).[14]
Powerball numbers are drawn from two sets of numbers, so the odds of winning a prize are calculated by combining the odds for both sets of numbers for all prize levels. The odds for matching just the Powerball are calculated by combining the odds of selecting the Powerball and the odds of not selecting any of the five numbers from the first set of numbers drawn.

On March 13, 2010, New Jersey became the first previous Mega Millions-only member (just before the cross-selling expansion) to produce a jackpot-winning Powerball ticket. It was worth over $211 million in annuity payments; it was sold in Morris Plains. On May 28, 2010, North Carolina became the first previous MUSL member (just before the cross-selling expansion) to produce a jackpot-winning Mega Millions ticket; that jackpot was $12 million (annuity).
Before the January 31, 2010 cross-sell expansion, Mega Millions was the only multi-jurisdictional lottery whose drawings were carried nationally, instead of airing only on stations in participating jurisdictions. Chicago-based cable superstation WGN-TV simulcast Mega Millions drawings on its national WGN America feed immediately following WGN's 9pm (Central Time) newscast. Following the cross-sell expansion, WGN also began airing Powerball drawings nationally. WGN served as a default carrier of both major games where no local television station carried either multi-jurisdictional lottery's drawings. Both drawings were removed from WGN America in late 2014 when it ceased carrying WGN's newscasts.[39]

Every jurisdiction has its own law on winners remaining anonymous. Some jurisdictions are required by law to provide the winner's name, city of residence, game won and prize amount to any third party that requests the information. Other jurisdictions allow winners to create trusts to shield their names from the public, or otherwise claim prizes anonymously. Check with your lottery to see if taking a photo of the winner is required and what its rules are on prize claims. Even if you keep your identity secret from the media and the public, you will have to be known to the lottery so officials can confirm you are eligible to play and win, as well as other legal requirements.
On October 13, 2009, the Mega Millions consortium and Multi-State Lottery Association (MUSL) reached an agreement in principle to cross-sell Mega Millions and Powerball in American lottery jurisdictions, with the two groups referred to as the "Mega Power Lottery"[7] by many users. The expansion occurred on January 31, 2010, as 23 Powerball members began selling Mega Millions tickets for their first drawing on February 2, 2010; likewise, 10 Mega Millions members began selling Powerball tickets for their first drawing the next day. Montana (joining Mega Millions on March 1, 2010) was the first jurisdiction to add either game after the cross-sell expansion. Nebraska (March 20, 2010), Oregon (March 28, 2010), Arizona (April 18, 2010), Maine (May 9, 2010), Colorado and South Dakota (the latter two on May 16, 2010) also have joined Mega Millions since the expansion.
Once your lottery ticket is purchased, scanned and uploaded to your account, you own the ticket and the rights of the ticket – legally speaking what the agent has after scanning in your ticket is just a piece a paper. (This is why you should never trust a website that claims it is legitimate and does not following the insurance model but does not scan the tickets and send them to you – red flag).
EuroMillions currently has a minimum jackpot of approximately €15 million and a maximum jackpot capped at €190 million, making EuroMillions by far the largest lottery prize in Europe. EuroMillions also has annual Superdraws several times a year, automatically boosting the jackpot to €100 million. To read more about these special jackpots, and for news on upcoming draws, see our EuroMillions Superdraw page!
The biggest Powerball jackpot, which is also the current lottery jackpot world record, was won on 13 January 2016! The jackpot was worth an incredible $1.58 billion and was shared by three extremely lucky ticket holders in California, Florida, and Tennessee. The second biggest Powerball jackpot to date was awarded to a lucky lottery player from Massachusetts who won an astounding $758.7 million jackpot in August 2017. Also notable is the story of Gloria MacKenzie, who used Quick Pick and matched all the numbers and the Powerball on 18 May 2013. The jackpot she won was worth $590.5 million! 
Despite the uneasiness of many to begin with, I know of no disputes or complaints from people who have bought Powerball tickets online via the insurance model, won and not been paid. As you can imagine, this scenario would effectively close down their website as they rely solely on the trust factor. The insurance model means that you will not be buying “official” tickets, but what do you care if you get paid your millions at the end of the day!
DV-2020 Program: The revised online registration period for the DV-2020 Program begins on Wednesday, October 3, 2018 at 12:00 noon, Eastern Daylight Time (EDT) (GMT-4), and concludes on Tuesday, November 6, 2018 at 12:00 noon, Eastern Standard Time (EST) (GMT-5).  Individuals who submit more than one entry during the registration period will be disqualified.
Nowadays there is a plethora of websites to choose from and new companies offer online lottery ticket service every day. Due to the nature of this industry and the fact that newcomers are popping up all over, it is advisable to be diligent and check out the lottery ticket provider carefully before you decide to buy Powerball tickets online with them. This is easily done with a quick google search and an investment of 5 minutes on your part. Trust us, the five minutes is worth it to be sure that when/if you play Powerball online and win, you actually receive your jackpot winnings.
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