Have You Ever Been Asked To Return Winnings?

[2020visions]

This question occurred to me the other day after seeing an article in the guardian in which somebody had placed a bet for which the odds were in fact shown incorrectly at 12/1 which they had put £50 on. The bet came in and the person withdrew their winnings immediately. After a couple of days the account showed a negative balance, which the individual I believe ended up paying back. In that situation it was completely understandable I think as the person even said they assumed the odds were incorrect as the team was 2-0 up late in the game so the odds for them to win at 12/1 had to be incorrect however they still made the bet therefore knowingly taking the risk it was incorrect. My query is not related to such a situation nor betting but rather casinos, slots, bingo, poker. Have any of you had a situation or know of anybody else that has had a situation, whereby they have won a sum of money, collected/withdrew and then been asked to return the winnings. If so could you please elaborate on the details of the situation. I ask this because the initial instance from the article in the guardian made me think. People rarely read the Ts & Cs on betting sites/online casinos, but in actual fact in a court of law there are many loopholes whereby the gaming company can actually get out of paying you and I wondered if there had ever been a situation in which a gaming company under law and their Ts & Cs had in fact legally asked for winnings back. Some particular situations which spring to  mind which in could be technically considered a breach of Ts & Cs however not necessarily legally/technically provable, would be; - somebody owes you money, makes transfer to your bank account or somebody gifts you some money .e.g. Mum gives you some birthday money, or some money to help you out and transfers to your bank account. Lets say you then use said funds in either situation and make a deposit, use the money to play on casino, games, bingo, poker, bets whatever you choose and win and withdraw. Technically could the operator not say those funds were provided by a third party? Albeit they weren't provided by a third party for you to bet on their behalf, they are your funds, inherently intended for you and you alone, so where is the line drawn on this? Would this also be the case for retrospective deposits? In light of these points could an operator in fact ask for you to return any winnings in such a situation? Another point which springs to mind is in the case that you have closed/self excluded from an account with a completely unrelated operator. Could previous operator from which you excluded in fact share information with the site/operator you are currently with and therefore they deem to also close your account and to return recent winnings? Also if you had created an account with another completely unrelated operator/site in the name of your spouse for the purpose of obtaining an extra bonus surplus to the one you already received on your account, could this information be shared across completely unrelated operators/sites with the decision then being taken by the other operators/sites where such bonus 'abuse' had not taken place  deciding to also close account or ask for recent winnings to be returned? Would be interested to hear what you think, particularly if you have any legal standing/background/experience?