WHEN i won some fine amount, the owner is asking me documents
Not sure but that must be written somewhere in their terms and conditions, since I don't play there I don't know of this but since you do you should have checked about this before.
Took only 2 seconds to find this:
3.1.3. You must enter all mandatory information requested into your registration form, including a valid e-mail address; if you do not enter a valid email address, we will be unable to help you recover any “forgotten passwords”. It is your sole responsibility to ensure that the information you provide is true, complete and correct. You are hereby notified that, in our discretion, we have the right to carry out KYC verification procedures and that your Member Account may be blocked for access or closed if you are found to supply false or misleading information.
