I would assume its fake and an attempt at identify theft at some level of the system. Is their PC infected at the OS level or just a fraudulent browser extension or something more like a popup ad masquerading as a system dialogue? A less trusting person would assume any request made by a computer is totally non-fraudulent and would gladly submit any requested private information.

"Dad, I can't do my math homework, a pop up says you need to provide a copy of your bank statement, your mom's maiden name, and a copy of your birth certificate, SS card, and drivers license, and can you hurry up Dad, my homework is due tomorrow morning." And people will fall for this once they get used to the system being absurd enough.

The fraud machine must be kept fed...