Yes, you can require a Social Security number to hire.

• Position: Legal Briefs

When Robert was offered a job, he refused to give his Social Security number, saying it was the devil's "Mark of the Beast." The job offer was rescinded. Robert sued, citing religious bias. The court tossed out the case, saying the employer had no choice but to use the SSN to comply with federal tax and immigration laws. (Lowman v. NVI, WD NY)

The lesson...