9/13/2010 11:20 AM (PST)

There is no purpose for anyone to ask you for your SSN for a prepaid credit card. So if this is merely a card you load with money for use, then no they should not be asking you for your SSN and if they are, I would urge you to contact the Federal Trade Commission as they regulate the credit card industry. Here's their link:

http://www.ftc.gov/ftc/contact.shtm

However if you are obtaining a secured credit card, that is a diffent story. Secured credit cards use a savings account which will likely require your personal information to establish to use as collateral for your credit line on a secured credit card account.