This is what I was shown by Richard. I'm not sure how this would be a duplicate account. Looks like he was telling the truth that he has had only one account in his life.
Dear RICHARD,
We are contacting you from JuicyStakes Casino.
Your account has been reviewed, and it was found to be closely related to another account in our system that has unresolved financial issues. As a result the decision has been made to permanently close your account, as it did not pass our security checks. This decision will not be reversed.
In the event that a new account is created under your name, it will be closed.
Regards,
Penelope
JuicyStakes Security Team