# National Identifier Types

<table data-full-width="false"><thead><tr><th>Abbreviation</th><th>Detailed description</th></tr></thead><tbody><tr><td>ARNU</td><td><strong>Alien Registration Number</strong> - A unique number assigned to non-citizens by immigration authorities.</td></tr><tr><td>CCPT</td><td><strong>Passport Card</strong> - A wallet-sized card issued by the government as a travel document.</td></tr><tr><td>DRLC</td><td><strong>Driver's License</strong> - An official document permitting a specific individual to operate one or more types of motorized vehicles.</td></tr><tr><td>FIIN</td><td><strong>Foreign Identification Number</strong> - An identification number assigned to foreign nationals.</td></tr><tr><td>IDCD</td><td><strong>Identity Card</strong> - A card used to prove a person’s identity.</td></tr><tr><td>LEIX</td><td><strong>Local Entity Identifier</strong> - A unique identifier for local entities within a country.</td></tr><tr><td>MISC</td><td><strong>Miscellaneous</strong> - Other types of identification documents not specifically categorized.</td></tr><tr><td>RAID</td><td><strong>Resident Alien ID</strong> - An identification card for resident aliens.</td></tr><tr><td>SOCS</td><td><strong>Social Security Number</strong> - A number issued to U.S. citizens, permanent residents, and temporary (working) residents.</td></tr><tr><td>TXID</td><td><strong>Tax Identification Number</strong> - A number used for tax purposes in various countries.</td></tr></tbody></table>