This document provides information about obtaining and protecting your Social Security Number (SSN). It can be obtained at birth when applying for a birth certificate or by proving identity if not obtained at birth. An SSN is needed for employment, government services, financial institutions, and more. Your SSN should be kept confidential and only shared when legally required. Be wary of unsolicited requests for your SSN and ask how it will be used, what happens if you refuse, and the legal basis for the request.