Seems the real Terri Lynn Deeds jr is victim of identity theft:
https://twitter.com/therealmsd40
Seems like a scam to me…
I would tell your customer to ignore this message and tell him that these kind of messages are being sent by people with bad intentions. Personally, I would never reply, unless you want to start something like sir Scamalot (https://www.youtube.com/watch?v=_QdPW8JrYzQ) 
To prevent spam you could do something like @Waldo suggests in this topic CAPTCHA and other spam prevention support - #9 by Toby or use a third party anti spam captcha kind of thing.
Hope this helps!