In what case would a person not have a social security number when a alien registration number has been obtained?
Correction I'm answering my own question,what would a LAPD cop do with your Social Security Number.
In the US, to get a person's Social Security Number you must ask them for it, but they don't have to tell you unless you are their employer. Social Security Numbers are not public information and there is no place where you can go to get the number of a living person, other than to that person or their legal guardian.
Your Medicare number is located on your red, white and blue Medicare card. It is usually a person's nine-digit social security number. That is why it is important to keep it secure. Sometimes the number is not a person's social security number. It will depend on how that person met eligibility for Medicare, but most often, it is a person's social security number.
Your Social Security number is yours to use for a lifetime. If you find out that someone else has used it notify the Social Security Office immediately. No one can use their Social Security number to connect a telephone for another person. It is their own personal number for their use only for their lifetime.