I get you, but I think you misunderstood my question. In this case if the OP had lost 5btc, would you refund 10btc instead of 15btc? And btw his transaction confirmed so you cannot prove doublespend. Saying he did, does not prove he did.
Regards.
Hi TrumpD,
Were sorry, but we will not go into details of how we (or other bitcoin casinos and sportsbooks) detect potential double spenders or our security procedures.
Further we take every incident on a case by case basis and thoroughly investigate everything; one of those things include the player being able to pass KYC.
The OP has now responded to us and sent us a bitcoin address for the original deposit (15btc) to be returned to, which our accounting team will do tomorrow, so we consider this case closed.
Cheers,
sportsbet.io