It is a common thing to read and hear about casinos banning an account or restricting payment to an account because of the issue of multi accounting. Some gamblers will start a thread to that complain that they have only registered one account but still are accused of the issue of multi accounting. I am not saying they are all liars, but who do we trust here? Casino that has made the accusation or player who has been accused.
What exactly is multi accounting? and is it that some gamblers do not know when they are defaulting on that? Asides opening multiple accounts in a casino, what else can cause it because the gamblers are always claiming that they do not have another account, and the casinos are not always providing proof of the other account when they make the accusation.
Why do gamblers use multiple casino accounts? At first glance, in order to get some bonuses for new gamblers. In this case, it is either useless or harmful to the casino, because the amount of money for gambling in this casino for this gambler will not increase in any way from an increase in the number of his accounts. Therefore, it is quite legitimate for casinos to block such accounts, and even more so if it is prohibited by the casino's TOS.
Overall, the situation is actually very simple. If multi accounts are prohibited in casinos (and they are prohibited everywhere except anonymous casinos, where they cannot be banned for technical reasons), then in case of violation of the TOS, the blame for account blocking lies entirely with the gambler. If he claims that account blocking is illegal, he should contact the regulatory authorities that issued the casino license. Or, if it didn't work, then gamble in another casino.