With these types of scams becoming increasingly common, I recommend everyone set up a code word with your family and don't tell anyone what it is. Practice it often. If you get one of these scam calls, ask for the code word to verify that it really is your family member.

"Hey, George? Can you send me a hundred bucks?"
"Password ass-sword? Gay geek goat god goon gout, Galaga Gaelic Gorky?"
"Hemp hops hoop harangue horny hope hobags, hyper Hungarian hippies."
"Infinite Ixian idiots incinerate imbeciles in interesting inquisitorial igloos."
"Just joking! Jerboas jaunt jerkily, just juxtaposing jinn, janky jobs, and jalopies."
"What's the password?"
"Always Swordfish."
"Okay fine, come on in."

Me thinks that one call from an old lady may have been just this, and when I chuckled a bit as I couldn't identify her voice she called me demented and hung up. Feel like the call was probing for the vulnerable.