An EIN is a unique business tax ID number that you can get online in just a few minutes. Many, or all, of the products featured on this page are from our advertising partners who compensate us when ...

SSN is a unique identification number associated with US citizens and some non-Americans living in the country. It has been around since 1936, introduced just a year after the Social Security ...

Like any individual, a business needs an identifier to separate it from every other company. Most small business owners get a separate tax identification number (TIN) in order to conduct business, ...

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.

Should you have a unique ID number for all your medical records? The Wall Street Journal asks that question today on its debate page, and University of Massachusetts Medical School chancellor Dr.

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Pete Rathburn is a copy editor and fact-checker with expertise in economics and personal ...

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 ...