[iMore Question]

I have been using my sons iPad for about 4 years, after the last update it keeps flashing a window asking for ID verification, he is no longer using the email and has no clue what questions answers areI think his ID may be linked to iCloud which I don't use so I never knew. My son did try to remember his password and got locked out as he couldn't remember his questions either....he was about 19 when he set it up so didn't think to make a note of anything
This little window flashing up every 10 seconds is driving me nuts, I know it's a security feature and no he did not keep the receipt so I can't prove I've paid for it, the most I can provide would be his ID
Is there anything I can do??