These aren't stories about foolish people. They're cases where a lot of money disappeared quickly, and nobody stopped it. Every figure here comes from a regulator's published decision, a court ruling or the original news report, listed at the bottom. In the UK cases the customers are anonymous; the regulator only names the companies.
In minutes and hours
In 2023 the UK Gambling Commission fined three William Hill group businesses a record £19.2 million. Among the failures: Mr Green let a new customer spend £23,000 in 20 minutes without any checks. Another new customer spent £18,000 in 24 hours, and a third £32,500 over two days, also without checks.
In 2021 the Commission fined Casumo £6 million. It found the operator didn't step in with a customer who lost £89,000 in five hours, or with another who lost £59,000 in 90 minutes.
Over weeks and months
The same Casumo decision describes a customer who lost £65,000 in one month and another who lost £76,000 over seven months, neither of them contacted about their gambling.
In 2022, 888 was fined £9.4 million. One customer lost £37,000 in six weeks during the Covid-19 pandemic without any contact from the operator. Another was allowed to spend £65,835 in five months without checks on where the money came from. The regulator also found 888 had given a customer it knew was an NHS worker earning £1,400 a month a monthly deposit limit of £1,300.
At William Hill's online business, one customer was allowed to spend and lose £70,134 in a month.
Over years
The most striking line in the Casumo decision: one customer lost £1.1 million over three years without a single responsible gambling interaction.
The biggest public cases
In 2007, Terrance Watanabe, a US businessman, bet a total of about $825 million in Las Vegas and lost around $127 million, at Caesars Palace and the Rio. He later sued the casinos' owner, claiming staff kept him drinking and gambling; the company said he was trying to avoid repaying money it had lent him.
In Australia, Harry Kakavas lost about A$20.5 million playing baccarat at Crown Melbourne between 2005 and 2006. He argued the casino had exploited his gambling problem. In 2013 the High Court of Australia unanimously rejected his case: the casino was not liable.
What these cases have in common
None of them happened in one unlucky bet. They happened because huge amounts went through the games, fast, and the house takes a cut of every bet. Watanabe's $127 million was lost on $825 million of bets. The more money goes through a game, the more predictable the result becomes, and the result always favours the house.
The other common thread is that nobody stepped in early. Regulators now fine operators for exactly that, but by the time a fine is issued, the money is long gone.
You can see the same mechanism, at your own stakes, in the calculator. If any of this feels familiar, free and confidential help is listed at the bottom of this page.
Sources
- UK Gambling Commission: William Hill group businesses to pay record £19.2m for failures (28 March 2023)
- UK Gambling Commission: Regulatory action against Casumo (25 March 2021)
- UK Gambling Commission: £9.4m fine for online operator 888 (1 March 2022)
- CBS News: Gambler lost $127M in 2007, sues casino (7 December 2009)
- High Court of Australia: Kakavas v Crown Melbourne Ltd [2013] HCA 25, judgment summary
- Melbourne Law School, Opinions on High: Casino not liable for bets made by problem gambler: Kakavas v Crown Melbourne Ltd