I thought I would update since I posted on this thread earlier. I called yesterday to check if we were in the system. I had (as I posted earlier) never provided our SS# at any time even though I was told I would need to. The rep at MS asked for my address and telephone number to verify it was me. I asked about my SS# and the rep told me they use that for identification purposes, but if it is not provided they use other means for verification. Again I can only report our experience, but we were never required to provide our SS# with a resale purchase we paid for with cash.