SSA does not propose, endorse, nor initiate action that would encourage the expansion
of nonprogram uses of the SSN. SSA will only consider extending the use of the SSN
within the framework of the Social Security program.
There is no law that prevents a third party from using an individual's SSN as an identifier
when provided by the individual. However, if the individual refuses to furnish the
SSN on request, the third party can refuse the benefit or service the individual requested.