Lot's of scams from "your SS card is frozen" to employers being told their payroll tax payment was received in error. I sent them all in for years and nothing ever happens. The employer web site used to ask for info., but now just says "watch out, there are bad people out there" and they no longer are interested either
I got a call yesterday that my social security number was canceled and I had to deal with it right away. Of course, I greatly appreciated the heads up and mailed them my original card along with a credit card number so they could fix this urgent issue.