William Hill and 888 “erroneously credited” customer accounts with huge sums, some running into the tens or hundreds of thousands of pounds, due to “valid or properly functioning gameplay”, parent company evoke has confirmed.
The FTSE 250 firm, which is in the process of retrieving the funds, hasn’t revealed how many users were affected by the error that occurred with the opt-in progressive Jackpot Drop feature, yet screenshots posted on X appear to show significant amounts had been credited to accounts by mistake.
One post shows a William Hill balance of almost £142,000, while another displays more than £236,000 sitting in the account.
Another X user claimed they had “won” £82,000 on 888casino, withdrew £5,000 but the account has since been “temporarily disabled” and the account was “under investigation”.
An unnamed person posted on Reddit Subreddit r/LegalAdviceUK explaining how their father had won “roughly £250,000” with William Hill but that the operator subsequently said there had been a “malfunction”.
The Reddit user shared correspondence with a William Hill representative which the operator said it had “identified an issue affecting the Jackpot Drop game which resulted in incorrect sums being credited to players’ balances”.
According to the post, William Hill writes that despite £1,950 having been withdrawn from the account, as a “gesture of goodwill” the company will allow the customer to keep 11% of the amount cashed out.
The correspondence suggests the operator asks for £1,736 to be returned, before providing bank details including sort code and account number to make the payment.
The Jackpot Drop pages at both the sites belonging to William Hill and 888casino are no longer available.
An evoke spokesperson told EGR: “During a routine review of platform activity, we identified an issue affecting the Jackpot Drop game which temporarily resulted in incorrect sums being credited to players’ balances and withdrawals being processed incorrectly.
“Whilst we quickly identified and resolved this issue, for a short period of time funds were erroneously credited to some customer accounts that were not correctly generated through valid or properly functioning gameplay.
“We have contacted relevant customers to clarify the issue, and are in the process of retrieving the funds in line with our standard terms and conditions. We have been grateful for our customers’ understanding on this matter.”
Last year, a Paddy Power customer won a five-year court battle over a £1m jackpot.
Corrine Durber was paid out £20,265 by the operator instead of the ‘Monster Jackpot’ win of £1.09m that was displayed on the Wild Hatter Game in October 2020.
The difference was attributed to a programming error with the game’s display, with Durber suing the operator. She was awarded the full prize after a High Court ruling in March 2025.
Meanwhile, in April 2021, a Betfred player won a High Court battle with Betfred over a £1.7m jackpot.
The Warrington-based bookmaker had refused to pay out citing a software error with the jackpot he won on Frankie Dettori Magic Seven Blackjack.
Betfred offered him £60,000 as a “goodwill” gesture, yet he sued Betfred for £2m, which included interest on his winnings.
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William Hill and 888 customers take to social media to say they have been informed payouts were “incorrect”, as operator attempts to claw back money withdrawn from accounts
The post Malfunction in evoke’s ‘Jackpot Drop’ feature sees players wrongly awarded six-figure sums first appeared on EGR Intel.