This is true, there are some casinos out there which when one of their gamblers obtains a big win they try to find even the smallest detail they can to try to refuse paying the money they owe, and one way to do this is by asking way more than what is needed for a standard identity verification, with the hope the gambler fails to provide the needed documents and then they save themselves a lot of money while still protecting their reputation, as they can later claim it was the gambler the one that failed to pass all their tests and they were justified on their refusal to pay them.