For me its not safe, but you cant do so much, also nowadays the goverment data sometimes its hacked so...... we dont know if already ou documents are in the web.
Generally there is a risk when KYC data is sent to any casino or gambling platform that have no license or comparatively weak. Because those sites can be hacked at any time. If a gambler can choose Trusted site he can send the KYC information. Because if they falsify that information, their site will be destroyed. When a gambler makes a new registration he must observe these things carefully before registration otherwise he may face danger later. Gamblers should not provide KYC data unless they can trust the site.