I realize I might be wrong on this, but I have very strong feelings about my personal information. I went by the campus bookstore this week for a shirt. During my 10 minute stay I received a parking ticket for not having a sticker. No problem, I went to the traffic office, told them I was visiting campus signed the back as requested and started to leave. The guy behind the counter called me back and said he would need my social to void the ticket. I said that he had the ticket and there was no need for it. In the end he said ticket would not be voided and I informed him it would also not be paid. There is just no need to give that information for that purpose!