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 ...

What is a tax ID number? It's a unique nine-digit number issued by the Social Security Administration or the IRS to anyone ...

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 ...

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.

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 ...