None can't be proof.

Unless there are some thread cases between the user who is facing the problem, a mediator who helps the case, and the casino statement the case are being resolved with the term (both of parties: user and casino confirm those). Everything in public thread, I been in Casino for around 3-4 years+ most of the times is about (online casino) and user who are facing more problems it's always from sportsbook user. Either:
- Regarding Arbitrage
- Or abused

However, I'm quite curious and what's the case ? I checking the email again. The explanation with simple brief:
- User place bet
- User facing restriction for the betting size
- User getting advice to play into other game provider
- He made withdraw and getting request to KYC (but he completed)
- In the end statement, he got message withdrawal was approved & getting paid

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If the complain it's about (betting size limited). In every term & condition, casino have some right to refuse any of his service to the user. Sportbook case it's always similar like (Blackjack Case in Real Casino Like Vegas), while some card counting Blackjack getting back off and refusing to visit the casino or play any blackjack game (even we all know card counting using our minds or head it's not illegal).

It's mostly on every casino.....