A friend in her 80s fell for "your grandson is in jail, please send his bail money" and lost $2500. She was still driving then, so there was no one to stop her from going to the bank and mailing off the money.
My mom was a Navy wife, and always worked on a Navy base or for the county government. As a result, for the rest of her life, any time she got a letter or phone call or Email purporting to be from:
An Insurance Company
A Utility Company
that is, any "authority" figure, she ALWAYS assumed that it was serious, and that what they said was true, and she'd snap to attention and Follow Orders. Luckily, we had joint access to her bank account at that time and would get notified if she tried to send money away.
That's understandable for people who grew up 80 years ago (although OUR guys here seem pretty sharp!) But how on God's Green Earth are they fooling people who grew up with the Internet? Even I, who didn't even see the Internet until I was 40, know that it's all a pack of lies and deceit, and if I got a notice saying that the Sky is Blue, I'd be pretty sure that it had turned green overnight ....?