@rizkyhiw. Bitcoin sportsbetting sites should not collect any type of documentation from their customers. That goes against what bitcoin is and how it should be used. If they are collecting it to protect themselves then that is understandable.
Also that is a strong accusation. You should provide some proof. Sometimes the sportsbook has the right to confiscate the funds of the user because of abuse or cheating.
As they operating in both bitcoin and fiat currency that time i think it's okay to give my documents
But everything turn crazy , without any clear notice they just block my account
Confiscated the funds and never answer to my email about this
It's been 1 year ago if i am remember correctly , they ignore my case , i just can suggest everyone to be careful.