Form I-9 (Employment Eligibility Verification) is the federal form U.S. Citizenship and Immigration Services (USCIS) publishes so employers can record that each new hire is who they claim to be and may work. Citizens and noncitizens both complete it. It is an employment paperwork step, not an immigration benefit.
Employee and employer timing
Complete Section 1 no later than your first day of work for pay. You attest to your citizenship or immigration status category on the form. Providing a Social Security number (SSN) is voluntary on the form unless your employer uses E-Verify, in which case the SSN is required. Never enter an Individual Taxpayer Identification Number (ITIN) in the SSN field.
The employer or an authorized representative must examine your original documents and finish Section 2 within three business days after you start. You choose which acceptable documents to present. The employer may not demand a specific document if what you offer is on the official Lists of Acceptable Documents and reasonably appears genuine.
List A versus List B plus List C
List A documents show both identity and employment authorization. Common List A examples for newcomers include an unexpired foreign passport with a temporary I-551 print or notation, a Permanent Resident Card, or an Employment Authorization Document (EAD, Form I-766). Some List A combinations use a foreign passport with Form I-94 (Arrival/Departure Record) that shows work-authorized nonimmigrant status, such as certain H-1B entries.
If you do not present List A, you present one List B identity document and one List C employment authorization document. List B examples include a state driver's licence or state ID card. List C examples include an unrestricted Social Security card or certain Department of Homeland Security employment authorization documents that are not the EAD itself. All documents must be unexpired unless USCIS rules create a listed exception.
Employers enrolled in E-Verify who receive List B plus List C must see a List B document with a photograph. E-Verify is a separate online system that checks Form I-9 information against government records. Not every employer uses it. A case result is not a visa approval and does not replace USCIS petitions.
What newcomers should prepare
Know your status documents before day one: passport, visa foil, I-94 printout from the Customs and Border Protection site, EAD, or green card as applicable. If your work permission has an end date, the employer may need to reverify later using Supplement B. Keep USCIS address updates current so replacement cards arrive.
Form I-9 does not replace labour condition applications, petition approvals, or state tax forms. It also does not enroll you in health insurance.
Common misconceptions
Completing Form I-9 does not create work authorization. You must already be allowed to work under your status or EAD.
Your employer may not insist on a passport if you present a valid List B and List C pair, or the reverse, as long as the documents are on the USCIS lists.
Summary
Fill Section 1 on day one, present original List A or List B plus List C documents within three business days, and keep copies of your immigration evidence for reverification. Treat E-Verify as an employer check, not a benefit grant.
If documents are delayed, ask HR about receipt rules published on I-9 Central rather than inventing temporary IDs.
Sources
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