Hello! It is easy! While visiting the site you should have the possibility to find info about license. If it is not displayed you should ask support team for it. If you do not get any info about license it seems at least strange. If you get some info just try to find some info about license issuer and read the regulations. Licensor should have control of the casino he has given the right to provide gambling activity to. If these issues are not obvious after having it checked - it is better not to have a risk! Best regards, 1win team