What Is a Social Security Number (SSN)? A Social Security Number (SSN) is a unique nine-digit number assigned to U.S. citizens, permanent residents, and temporary residents who are authorized to work ...

Companies, like people, are usually known by their names, but people and companies both have other types of identification, often issued by government agencies in the form of identification numbers.

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Toby Walters is a financial writer, investor, and lifelong learner. He has a passion for ...

A Taxpayer Identification Number (TIN) is a unique nine-digit number the Internal Revenue Service uses to identify individual taxpayers. A TIN can come in different varieties, including Social ...

You use your credit card on a regular basis to make purchases. While most people know that the numbers on the card are unique identifiers, most of us have no idea what they actually mean. Credit card ...

Business owners can get a DUNS number for free through the business credit bureau Dun & Bradstreet. Many, or all, of the products featured on this page are from our advertising partners who compensate ...

A PAN card is a key document required for financial and banking transactions, while Aadhaar is a 12-digit unique ...

(iSeeCars) – Every modern automobile carries a 17-character vehicle identification number, an alphanumeric string unique to that single car. Since 1981 federal rules have required that format, which ...

As the U.S. invests billions of dollars to convert from paper-based medical records to electronic ones, has the time come to offer everyone a unique health-care identification number? Proponents say ...