What form is used by an employer to verify an employee's identity in the U.S.?

The form used by an employer to verify an employee's identity in the U.S. is the I-9 form. This employment eligibility verification form is required by federal law and serves to ensure that individuals authorized to work in the United States are indeed eligible for employment.

When new employees start, they must complete the I-9 form by providing information such as their name, address, and date of birth, as well as presenting documents that establish both identity and employment authorization. The employer retains the completed I-9 form and is responsible for ensuring it is filled out correctly and for reviewing the provided documentation.

The other forms listed serve different purposes. The W-2 is used to report an employee’s annual wages and taxes withheld, the 1099 is utilized for reporting income received by individuals who are not considered employees (such as freelancers or independent contractors), and the W-4 is the form employees complete to declare their tax withholding preferences.