What is another word for social security number?
Pronunciation: [sˈə͡ʊʃə͡l sɪkjˈʊ͡əɹɪti nˈʌmbə] (IPA) 
A social security number (SSN) is a unique identifier assigned by the United States government to its citizens and residents. However, there may be instances where an individual may not want to use their SSN, or it may not be required. In such cases, there are alternative terms that can be used to refer to this number. These include taxpayer identification number (TIN), employer identification number (EIN), individual taxpayer identification number (ITIN), national identification number (NIN), personal identification number (PIN), and identification code (ID code). While these terms may not necessarily mean the same as an SSN, they can be used interchangeably or in place of an SSN when needed.
