All Social Security cards have the words ‘Not For Identification’ printed on them, but nevertheless, Social Security numbers are our de facto national method of personal identification. Why is that? It is because Social Security numbers are unique and permanent. Once you get a Social Security number, it is yours for life. It is almost impossible to change it. You can change most of the other numbers that identify you. You can easily change your phone number. You can also easily change change your address, bank account number, credit card number, and even your driver’s license number; but you can’t change your Social Security number. That is why Social Security Numbers are the Holy Grail of identity thieves.
You should always be very reluctant to tell anyone your Social Security number. You should reveal your Social Security number on a need-to-know-basis only. Some people and businesses really do need to know your Social Security number. Employers need it for tax purposes. Landlords and credit card companies need it so they can run credit reports. However, most of the businesses that ask you for your Social Security number don’t actually need it. For example, doctors and hospitals routinely ask new patients for their Social Security numbers, but they rarely need this information. When in doubt, either leave the Social Security number line blank on forms and see what happens or ask someone why they need it.
You should never include your Social Security number in an email. Email is not a secure method of communication. Also, never give your Social Security number to someone calling you on the phone, even if the person claims to be working for the federal government or your bank. The federal government and your bank already know your Social Security number. You should also never carry your Social Security card or have your Social Security number written down on anything in your wallet.