From the web: People are required to provide their SSN for tax returns and federal loans, credit applications, government programs, financial institutions, empl

From the web: People are required to provide their SSN for tax returns and federal loans, credit applications, government programs, financial institutions, employers and the Department of Motor Vehicles, according to the Social Security Administration (SSA). Social Security numbers are also required for credit reporting companies. However, physicians, dentists, utilities, potential employers, employment recruiters, temp agencies and schools often ask people for their SSN. Some retailers, pawn shops and other businesses also ask for these numbers, and while there is no legal requirement to provide your Social Security number, no law prevents them from refusing to do business with you if you refuse. Personally, I do not provide my SSN in most cases where it is requested. I usually ask why they want it and then decline.