I only gave them my SS Card if I knew for sure that they needed to see it and the was mostly when I was hired for different jobs in my lifetime and the Military when I enlisted. Other than that I might have told some what it was, but only if it made sense that they be told. I always have it on me, now more than ever, but it is so deep in my wallet that it takes me a half hour to get it out of there even though I know where it is.