This happened to me just now -
So when I am commenting on an article I am reading on LiveMint, which had some problems in linking. Apparently the third page of the article has been wrongly linked to another article by Vir Sanghvi on Rolling Stones while I was reading an article on data mining. I try to point out that, and I get this error (INVALID written next to my first name).
So today's discovery- I have an invalid first name. Thank you Amma, Appa for giving me an invalid name. Ayyo!!!