Form I-9 Employment Eligibility Verification is a federal document required under the Immigration Reform and Control Act that verifies a worker’s identity and legal authorization to work in the United States. Employers must complete the employment eligibility verification form for every new hire, including U.S. citizens, lawful permanent resident workers and certain nonimmigrant employees.

The form confirms employment authorization by requiring employees to attest to their status and present documentation from the official lists of acceptable documents maintained by U.S. Citizenship and Immigration Services (USCIS). These documents confirm an employee’s identity and work authorization. Examples include a U.S. passport, a green card or permanent resident card, a driver’s license paired with a List C document such as a Social Security card or an employment authorization document (EAD).

Employers must complete Section 2 within three business days of the employee’s first day of employment. The employee must complete Section 1, often described as “complete section 1,” on or before the first day of work. The version of Form I-9 used must match the most current version of Form I-9 issued by USCIS. Guidance on how to complete the form is published in the Handbook for Employers and maintained through the government portal I-9 Central.

In some situations, employers must conduct reverification when an employee’s work authorization expires. This step may involve reviewing documents such as Form I-94 or other immigration status documentation. Agencies, such as the U.S. Department of Homeland Security (DHS) and Immigration and Customs Enforcement, may audit I-9 records to verify compliance.

What Employers Must Do to Stay Compliant

Employers have strict responsibilities under federal law when verifying employment eligibility. Compliance requires accurate document review, correct completion of the form and proper record retention.

Key responsibilities include:

• Completing Section 2 within three business days of the first day of work

• Reviewing original employee’s documents from the official lists of acceptable documents

• Accepting valid List B documents paired with a List C document when applicable

• Recording document titles, issuing authority and expiration date when present

• Retaining completed forms according to retention requirements

Employers should not request specific documents or treat workers differently based on citizenship status. Independent contractors are not subject to Form I-9 requirements because they are not employees under federal law.

Agencies including DHS, the Department of Justice and the Department of Labor may enforce compliance or investigate discrimination related to the verification process.

Understanding the Form I-9 Sections

The employment eligibility verification form contains several sections that must be completed at different stages of employment.

Section 1: Employee Information and Attestation

The new employee must complete Section 1 on or before the first day of employment. This section requires personal information such as name, date of birth and Social Security number if used for E-Verify. The employee also selects their immigration status category such as U.S. citizen, non-citizen national, lawful permanent resident or authorized nonimmigrant worker.

Section 2: Employer Review and Verification

Employers review the employee’s documents and record them in Section 2. Documents may include a U.S. passport, permanent resident card, foreign passport paired with Form I-94 or combinations of List B documents and List C documents.

Supplement A and Supplement B

Supplement A may be used when a preparer or translator assists the employee in completing Section 1. Supplement B is used for reverification or rehire situations when employment authorization expires or an employee returns to work.

Understanding these sections helps human resources (HR) professionals maintain compliance with the I-9 process.

Using Technology to Simplify I-9 Management

Digital HR tools and compliance platforms help organizations manage I-9 requirements more efficiently. Many HR teams integrate the verification process into onboarding systems that guide users through each step.

Technology can support I-9 management by:

• Tracking deadlines for completing Section 2

• Storing electronic copies of documents securely

• Maintaining audit trails for compliance reviews

• Integrating E-Verify checks with employee records

• Alerting HR when reverification deadlines approach

Electronic systems also help employers track which version of Form I-9 is currently in use and maintain records according to federal retention guidelines.

Common I-9 Compliance Pitfalls to Avoid

Even experienced HR teams may encounter compliance risks during employment verification. Small documentation mistakes can lead to significant penalties during government audits.

Common errors include:

• Failing to complete Section 2 within three business days

• Recording incorrect information from employee documents

• Accepting expired documentation such as an invalid employment authorization document

• Using an outdated version of Form I-9

• Missing reverification when an EAD or immigration status expires

Regular internal reviews and training can help organizations maintain compliance and avoid penalties during DHS audits.