In the US, the Internal Revenue Service (IRS) issues tax processing numbers known as Individual Taxpayer Identification Numbers, or ITINs. Those who are required to pay taxes but are not eligible to receive a Social Security Number (SSN) from the Social Security Administration utilize this nine-digit number for tax reporting purposes. Individuals can use ITINs to complete their tax obligations, including submitting tax returns and reporting income to the IRS, and to comply with U.S. tax regulations. They are not meant to be used for any other identification or legal purposes; they are only used for tax purposes.
In the US, the Internal Revenue Service (IRS) issues tax processing numbers known as Individual Taxpayer Identification Numbers, or ITINs. Those who are required to pay taxes but are not eligible to receive a Social Security Number (SSN) from the Social Security Administration utilize this nine-digit number for tax reporting purposes. Individuals can use ITINs to complete their tax obligations, including submitting tax returns and reporting income to the IRS, and to comply with U.S. tax regulations. They are not meant to be used for any other identification or legal purposes; they are only used for tax purposes.
See here for more information about iTINs.