On Tue, 13 Dec 2016 01:37:45 -0500, Don McC advised:

Depends upon the state. All parties to the conversation must be warned in
Maryland
as Linda Tripp found out after she recorded Monica Lewinski. But in many other
states any party to the conversation may record it with no warning given.
http://www.dmlp.org/legal-guide/reco...-conversations

I am not a lawyer but I would think that in most states, you're allowed to
record a crime in progress.

Even if not, I'm sure a judge isn't gonna throw the book at you if that's
what you were doing (in that your purpose wasn't privacy invasion nor
malicious acts).

And even more so, the law often takes the worse of two evils when there are
multiple evils going on (as a practical matter). Plus the offended party
would be the scammers themselves, who are almost certainly in India (based
on their obvious accents).

So while Paul is worried for me, I would tell him to worry more that some
little old lady is going to get scammed by these scammers.