If anyone tries to sell you stock in a non existent company, call the SEC.
It is done all the time on Ebay; ie worthless stock certificates
That is different. You're free to sell dead stock certificates all you want. Many are collectors items(you'll see them on Pawn Stars a lot). Selling them as legitimate securities is not allowed.
Sentiment: Strong Sell
Maybe I'm wrong, but there are no ekdkq stock certificates (paperless stock) but only registration of these shares on behalf of a shareholder in the securities register.