When registering an Admiral Casino account, you're asked to select a security question and provide an answer.
This is a security measure that only you, as the authorised person has knowledge.
It serves as additional verification and is used when you want to clarify an issue to do with your account, winnings or deposits and withdrawals over the telephone with our Customer Support Department.

This is how you set your security question and answer:

Log in and click on your user symbol at the top right on the website.
Select "Account" in the menu on the left and the click on the second tab, "Account Data".
This is where you can select a desired security question from a list and enter the appropriate answer.
Complete this process by entering your password again and clicking on 'Save'.
See link: https://www.admiralcasino.co.uk/en/user/personal-settings/account