What Is Form i9?

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Published By: WebHR Team

Updated On: 2026-05-22 07:26:16

What Is Form i9?

What is Form i-9?

Form I-9, officially known as the Employment Eligibility Verification form, is a federal document required by the United States Citizenship and Immigration Services (USCIS) to confirm that every new hire is who they claim to be and is legally authorized to work in the United States.

It applies to all new employees regardless of citizenship status both U.S. citizens and non-citizens must complete the process.

The form exists as a direct result of the Immigration Reform and Control Act of 1986, which made it unlawful for employers to knowingly hire individuals who are not authorized to work in the country.

Form I-9 is the mechanism through which that law is enforced at the employer level, creating a standardized, documented verification process that applies consistently across every industry and organization size.

Why Form I-9 Is Required

The core purpose of Form I-9 is twofold: verifying identity and confirming employment eligibility.

Every employer covered by federal law must complete it for each new hire, and the obligation does not disappear after the hiring process ends.

The form must be retained, kept accessible for government inspection, and in some cases updated when an employee's work authorization expires.

Beyond individual compliance, Form I-9 serves a broader policy function. It creates a nationwide paper trail that allows USCIS and Immigration and Customs Enforcement (ICE) to audit employer hiring practices and identify organizations that are knowingly or negligently employing unauthorized workers.

For employers, maintaining accurate I-9 records is not just a legal formality it is a meaningful safeguard against penalties that can range from civil fines to criminal prosecution.

Who Must Complete Form I-9

Form I-9 is required for virtually every new hire working inside the United States, whether they are employed full-time, part-time, or on a temporary basis. U.S. citizens are not exempt the form applies to all workers regardless of nationality or immigration status.

There are limited exceptions. Independent contractors are not subject to the I-9 requirement because they are not classified as employees under federal law.

Individuals performing work entirely outside the United States are also exempt. However, employers should exercise caution when classifying workers as contractors, since misclassification treating an employee as a contractor to avoid compliance obligations is itself a violation that USCIS and the Department of Labor actively investigate.

Structure of Form I-9

Form I-9 is organized into three sections, each with a specific completion responsibility and deadline. Understanding what each section requires and who is responsible for completing it is essential to avoiding the most common compliance errors.

Employee Information and Attestation

Section 1 is the employee's responsibility and must be completed on or before the first day of employment. In this section, the employee provides their full legal name, address, date of birth, and Social Security number where applicable.

They also attest to their employment eligibility status by selecting one of four categories: U.S. citizen, non-citizen national, lawful permanent resident, or alien authorized to work.

The employee signs and dates the section, certifying under penalty of perjury that the information provided is accurate.

Employer Review and Verification

Section 2 is the employer's responsibility and must be completed within three business days of the employee's first day of work.

The employer physically examines original documents presented by the employee to verify both identity and work authorization. Acceptable documents fall into three categories List A documents establish both identity and employment eligibility (such as a U.S. passport), List B documents establish identity only (such as a driver's license), and List C documents establish employment authorization only (such as a Social Security card).

An employee may present either one List A document or a combination of one List B and one List C document.

Reverification and Rehires

Section 3 is used in two specific circumstances: when an employee's work authorization document expires and reverification is required, or when a former employee is rehired within three years of the date their original Form I-9 was completed.

In both cases, the employer records the updated document information and signs the section to certify continued compliance. Rather than completing an entirely new form, Section 3 allows the existing record to be updated, keeping all I-9 documentation consolidated in one place.

Form I-9 Retention Requirements

USCIS imposes specific retention rules that employers must follow to remain compliant.

Each Form I-9 must be retained for either three years after the date of hire or one year after the employment relationship ends, whichever date is later.

This formula ensures that forms remain on file throughout the employment period and for a reasonable time afterward, giving federal investigators access to records if an audit is triggered.

Forms must be stored in a way that makes them readily accessible for inspection.

They should be kept separately from standard personnel files to simplify retrieval during an audit and to limit access to sensitive employment eligibility information.

Electronic storage is permitted provided the system meets USCIS technical and security standards, including the ability to produce legible copies and maintain an audit trail of any changes made to the records.

Electronic Form I-9 and E-Verify

Electronic I-9 Systems

Employers may complete and store Form I-9 using electronic systems rather than paper, provided those systems comply with USCIS requirements for data integrity, security, and accessibility.

Electronic I-9 platforms reduce paper storage burdens, improve accuracy through automated field validation, and simplify the retrieval process during audits.

Any system used must be capable of producing legible reproductions of the completed forms and must maintain a complete audit trail documenting who accessed or modified each record and when.

E-Verify

E-Verify is a separate, voluntary federal program mandatory in some states and for federal contractors that allows employers to electronically cross-check the information provided on Form I-9 against Social Security Administration and Department of Homeland Security databases.

While E-Verify does not replace Form I-9, it adds an additional layer of verification that can reduce the risk of unknowingly employing unauthorized workers.

Employers participating in E-Verify must still complete Form I-9 for every new hire and must follow anti-discrimination rules in how they use the system.

Common Form I-9 Mistakes Employers Make

Despite its straightforward structure, Form I-9 generates a surprisingly high rate of compliance errors.

The most frequent issues include missing signatures or dates in Section 1 or Section 2, completing Section 2 outside the three-business-day window, and accepting expired documents as proof of identity or work authorization.

A particularly important and often misunderstood rule is that employers cannot specify which documents an employee must present.

The employee has the legal right to choose any valid document or combination of documents from the approved lists.

Requesting a specific document, such as insisting on a U.S. passport rather than accepting a driver's license and Social Security card, constitutes document discrimination and can expose the employer to a separate category of legal liability.

Storing I-9 forms incorrectly such as mixing them with general personnel files or failing to retain them for the required period is another common compliance gap that surfaces frequently during audits.

Penalties for Form I-9 Non-Compliance

The consequences of failing to properly complete, retain, or manage Form I-9 can be severe.

Civil fines apply to paperwork violations errors, omissions, and late completions and are assessed on a per-violation basis, meaning the total exposure grows quickly for employers with large workforces or systemic recordkeeping failures.

Knowingly hiring or continuing to employ unauthorized workers carries significantly higher penalties and can result in criminal prosecution in egregious cases.

USCIS and ICE conduct both targeted and random I-9 audits, and employers who receive a Notice of Inspection have only three business days to produce their forms.

Organizations that are unprepared with incomplete records, improperly retained forms, or systemic errors across their I-9 documentation face both the financial cost of fines and the reputational damage that comes with a publicized immigration enforcement action.

Best Practices for Form I-9 Compliance

Consistent I-9 compliance is built on training, process, and regular self-auditing.

HR personnel responsible for onboarding should receive thorough training on what constitutes a recordable hire, how to complete each section accurately, what documents are acceptable, and how long forms must be retained.

A standardized onboarding checklist that includes I-9 completion as a time-sensitive step rather than an afterthought prevents the late-completion errors that are among the most common violations cited in audits.

Conducting periodic internal audits of existing I-9 forms is equally important. Reviewing records proactively allows employers to identify and correct errors before a government inspection occurs, and while self-identified corrections do not eliminate liability entirely, they demonstrate good-faith compliance efforts that regulators typically take into account.

Staying current with USCIS updates is also essential, as the agency periodically revises the form itself and the list of acceptable documents using an outdated version of the form is itself a compliance violation.

Conclusion

Form I-9 is one of the most universally applicable federal compliance requirements in U.S. employment law. Every employer who hires workers inside the United States must complete it accurately, retain it for the required period, and manage it in a way that allows for prompt government inspection when requested.

The form's three-section structure employee attestation, employer verification, and reverification creates a complete record of employment eligibility that follows both the employee and the employer throughout the employment relationship.

Organizations that approach Form I-9 management as a genuine compliance priority, rather than routine paperwork, significantly reduce their legal exposure, protect their workforce, and build a hiring process that holds up under scrutiny.