Form I-9 and E-Verify: How U.S. Employers Check Work Authorization

On your first day at any legal U.S. job, before almost anything else, you will fill in Form I-9. Many employers will then also run your details through a government system called E-Verify. Neither is a trap, both are routine, but foreign workers should understand how they work, because mistakes in this process can stall a job start that took months to win.

Form I-9: the universal first-day form

Federal law requires every U.S. employer to verify the identity and work authorization of every new hire, citizens included, using Form I-9. You complete your section no later than your first day of work; the employer must examine your documents and complete their section within three business days of your start date.

Which documents you show

The form offers lists of acceptable documents, and crucially, you choose which valid documents to present from the lists, the employer cannot demand specific ones. Broadly:

• List A (identity and work authorization together): for foreign workers this is typically an unexpired foreign passport with I-94 showing your work-authorized status, or an Employment Authorization Document (EAD), or a green card.
• List B plus List C (identity plus authorization separately): for example a state driver's license plus an unrestricted Social Security card, a combination more common for citizens and permanent residents.

An employer who insists on extra documents beyond the rules, or rejects valid documents because you are foreign, may be committing document abuse, which is unlawful discrimination you can report to the Department of Justice's Immigrant and Employee Rights Section.

E-Verify: the online check

E-Verify is a federal web system that compares your I-9 information against SSA and DHS records. It is mandatory for federal contractors and required by law in a number of states, and many large employers use it voluntarily, so assume you may encounter it. The check usually returns "employment authorized" within seconds.

If you get a mismatch (TNC)

Sometimes the system returns a Tentative Nonconfirmation, often caused by name mismatches after marriage, transliteration differences, or a recent status change not yet in the databases. Know your rights:

• The employer must give you written notice and cannot fire you, suspend you or delay pay while you contest.
• You choose whether to contest; if you do, you typically have around ten federal working days to contact SSA or DHS to fix the record.
• Only a Final Nonconfirmation permits the employer to end your employment.

Prevention is simple: keep your name spelled identically across passport, visa, SSN record and job paperwork, and update SSA after any status change, see our guide to the Social Security number process for new foreign workers.

Reverification when your documents expire

If your work authorization has an end date, say, an EAD or an H-2B stay ending, the employer must reverify before that date, using a fresh Section B entry on the I-9. Two things worth knowing here: the employer may not demand a specific renewal document (again, your choice from the lists), and in several categories, timely-filed renewals automatically extend work authorization for a period even while the new card is pending, a rule some HR departments do not know. If a renewal is in progress, bring your receipt notice to HR early and, if they hesitate, point them to the automatic-extension guidance on the USCIS I-9 Central pages rather than losing days of work to a fixable misunderstanding. Note that identity documents that merely expire, like a driver's license used from List B, do not normally trigger reverification; only work authorization does.

What this system means in practice

• Employers who skip the I-9 entirely and pay cash are exposing you, not protecting you: no wage records, no workers' comp trail, no proof of employment for future immigration steps.
• Never buy or borrow documents to pass verification; document fraud can permanently bar future visas and green cards.
• Keep copies of everything you sign on day one.

Legitimate sponsorship and legitimate verification go together; an employer who does real visa sponsorship will run a clean I-9 process, and nobody legitimate charges workers for a job offer.

This is general information, not legal advice. Authoritative guidance lives at uscis.gov (I-9 Central and E-Verify pages) and justice.gov for discrimination complaints.

Verified, above-board employment starts with meeting above-board employers. Create your free profile on Workmerica, it is free with no credit card, and U.S. employers contact you directly.