It's not uncommon for online casinos to have their own verification procedures. Fortune Jack is considered to be a legitimate and safe platform to use but s I remember I had a bad experience with one of their customer support way back then few years ago, well its not bad at all, just disappointed and it’s a different story, not related to KYC. Almost all crypto casinos now require users to complete the verification process so they can withdraw their winnings. The KYC requirements may vary depending on the user’s location and the amount of money they have won. Once the KYC process has already been completed, then the security check is likely a routine procedure to ensure that your account is secure.