I am really interested in the square app that can accept credit cards. However they require a social security number. I know this company is fairly new and I just wanted to know do u guys think it is safe giving them the number. I know it's for identity purposes but this is the only thing keeping me from activating. Has anyone here used it and really liked it. I'm not a business owner. I'm still a student but I plan on starting a private saxophone studio soon and it would very convenient to use this so parents don't have to have cash or checks when they pay.