Take note, Casinos will ask or demand a KYC if there's a big winning involved, is this one of their ways to scam their players?
It's somehow debatable because there are other platforms that I personally know of that are not really strict about their KYC procedure as long as you can provide the needed documents to prove that it's you personally who have won the money and of course, if you're eligible to get the massive wins and that you're already old enough to be playing for starters.
Although I also heard some isolated cases that casinos are using KYCs to get away with their responsibilities and has been using that ever since to decline the users of their winnings. I'd say, we've signed up for it and it was our own choice that we chose them and personally, it's already a gamble choosing reliable and reputable casinos because we all know that they are all not the same
Yes, there are cases where winners have complied with the KYC requirements but casinos aren't allowing them to pass the procedure which I think is unfair to players who have experienced such a thing. That's also one of the reasons why most gamblers these days are avoiding KYCs to get rid of unnecessary and unexpected situations in the future.
With reputable casinos, I don't have any doubt when it comes to passing the KYC requirements as I believe that they are protecting their users' private information. They aren't using KYC against their players as long as all the required documents are complete. Casinos really have to require KYCs to protect their site and to avoid abuse at the same time. They are also requiring it to track fraudulent activities.