KYC verification is often licensed but casinos can control everything they want because of this he got involved in various criminal activities. That's why by reviewing online casino and gambling sites we always make sure that we cover all the important information and essentials. When deciding which online casino to choose we recommend that you thoroughly check the latest information on a casino's security system payouts player feedback about that casino and more. Players sticking to big name mainstream casinos can avoid having to investigate them for a license since no reputable casino operates without one. It's the players who like to hedge bets and discover exciting new places to play that require a bit more caution.
Guideline like what document to use and how the procedures will go, that is why, most of the casinos always demand for government issued ID for the verifications, so if you see any casino that claim to be KYC compliance but have its own specific roles that they are using to scam their customer then such casino may be far from being truly licensed from government.
Well first coming to your question how will we know that a casino is asking for the KYC to scam us in some way or it is because they need to avoid by the government regulations ? There is no way to know this because in both cases they will ask for the normal ID documents. The real ones will keep them secure and only issue to the government if required for any money laundering or any suspect cases while the scam ones may misuse the KYC or even may sold to them to the third parties but for the end users & the gamblers there is no way to distinguish between the two.
In order to get things easy the best way to go is to play on that trusted casino which are advertising here on this forum and most of them are KYC enabled.