When must I reverify an employee's Form I-9?

No later than the date the employee's employment authorization expires (8 CFR 274a.2(b)(1)(vii); USCIS I-9 Central).

Which part of Form I-9 is used?

Supplement B, Reverification and Rehire (formerly Section 3). Complete one block and attach it to the employee's original Form I-9 (USCIS).

What documents can the employee show?

Any unexpired document from List A or List C that shows authorization to work, including an unrestricted Social Security card. Receipts for a lost, stolen or damaged document are acceptable (USCIS).

Should I reverify a green card holder?

Not if the employee presented a Form I-551 Permanent Resident Card for Section 2. USCIS says not to reverify these employees, U.S. citizens and noncitizen nationals, or List B documents.

US · Expiry & renewal tracking

Reverify Form I-9 before work authorization expires

An employer must reverify an employee's Form I-9 no later than the date the employee's work authorization expires (8 CFR 274a.2(b)(1)(vii)), using Supplement B. If reverification does not take place, the individual may no longer be employed; USCIS suggests reminding employees at least 90 days in advance.

If an employee's employment authorization expires, the employer must reverify on Form I-9 that the employee is still authorized to work in the United States; otherwise the individual may no longer be employed. Reverification must happen not later than the date work authorization expires (8 CFR 274a.2(b)(1)(vii)).

According to USCIS, reverification is needed when the employee's employment authorization or, in most cases, the employment authorization documentation expires. The employer completes one block of Supplement B, Reverification and Rehire (formerly Section 3), and attaches it to the employee's original Form I-9.

The employee must present an unexpired document from List A or List C that shows authorization to work; receipts for a lost, stolen or damaged document are acceptable. USCIS suggests reminding employees at least 90 days before reverification is required.

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At a glance

Deadline	Not later than the date work authorization expires (8 CFR 274a.2(b)(1)(vii))
Form	Form I-9, Supplement B (formerly Section 3)
Employee presents	Any unexpired List A or List C document, or an acceptable receipt
Do not reverify	U.S. citizens and noncitizen nationals; permanent residents who presented a Form I-551; List B documents
Suggested reminder	At least 90 days before (USCIS)

Who is responsible?

The employer (or a recruiter or referrer for a fee). The employer reviews the document, and if it appears genuine and relates to the employee, records the document's number and expiration date on Form I-9 and signs the attestation.

If the deadline passes

USCIS states that an employer cannot continue employing a person who does not provide proof of current employment authorization. Under 8 CFR 274a.2(b)(1)(vii), if reverification does not take place, the individual may no longer be employed.

Who not to reverify

USCIS says employers should not reverify U.S. citizens and noncitizen nationals, lawful permanent residents who presented a Form I-551 Permanent Resident Card for Section 2 (including conditional residents), or List B documents. Track only the dates that really need reverification.

Tracking it with ExpirySuite

Add each employee whose Form I-9 needs reverification and record the date their work authorization expires.
Reminders arrive 60, 30, 14, 7 and 1 day before expiry and on the expiry day.
Assign a responsible person (for example HR) for each employee so the right person gets the reminder.
If a date passes, managers get overdue reminders 3, 7 and 14 days later.
Ask the employee to upload the new document through a secure upload link, valid for 14 days; no account is needed. You still have to review the document yourself and complete Supplement B.

Frequently asked questions

When must I reverify an employee's Form I-9?: No later than the date the employee's employment authorization expires (8 CFR 274a.2(b)(1)(vii); USCIS I-9 Central).
Which part of Form I-9 is used?: Supplement B, Reverification and Rehire (formerly Section 3). Complete one block and attach it to the employee's original Form I-9 (USCIS).
What documents can the employee show?: Any unexpired document from List A or List C that shows authorization to work, including an unrestricted Social Security card. Receipts for a lost, stolen or damaged document are acceptable (USCIS).
Should I reverify a green card holder?: Not if the employee presented a Form I-551 Permanent Resident Card for Section 2. USCIS says not to reverify these employees, U.S. citizens and noncitizen nationals, or List B documents.

Sources

Last checked: Sep 30, 2026 · This page summarises official sources for general information and is not legal advice. Check the linked sources for current rules and fees.

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Reminders on time

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