ICE Just Arrived at Your Business: The 30-Minute Response Playbook for California Employers
General Defense Resources
Worksite immigration enforcement is at its highest level since 2018, and the first 30 minutes of an ICE workplace visit can often have an outsized impact on an employer's legal exposure. They shape how agents gain access, what records are produced, and how later employment decisions are documented.
An ICE raid response for California employers built on outdated assumptions about AB (Assembly Bill) 450 can leave you either over-cooperating in ways that create liability, or under-cooperating in ways federal courts have already said don't carry the state penalty employers assume they do.
Here's the current playbook on what to do in the first half hour, what California law enforces right now, and what changed in the federal rules this year that most guidance may not reflect.
Key Takeaways
AB 450's penalty provisions for warrantless entry/records access have been federally enjoined since 2018 and remain blocked. Only the I-9 inspection notice requirement carries a live state penalty.
Employers still retain the right to decline consent and require a judicial warrant for non-public areas, independent of AB 450's current enforcement status.
Since March 16, 2026, ICE has eliminated the 10-day cure period for over ten previously correctable I-9 error categories, making them immediate, penalty-bearing substantive violations.
Current I-9 penalties range from $288 to $ 2,861 per form for paperwork errors and up to $28,619 per worker for repeat knowing-hire violations.
I-9 records must be retained for the longer of one year post-termination or three years post-hire.
Why This Is Urgent Right Now
Worksite enforcement is an active, well-resourced federal priority today, and the data from multiple independent sources back that up.
ICE announced a 120% increase in its workforce in January 2026, adding more than 12,000 officers through the largest recruitment campaign in the agency's history.
Separately, Notices of Inspection, the paperwork trigger for an I-9 audit, rose roughly tenfold in 2025 compared to 2024.
In April 2025, the IRS and DHS signed a memorandum of understanding allowing ICE to submit names for cross-verification against tax records. The agency requested information on roughly 1.28 million individuals, though the IRS was only able to verify about 47,000 of those names.
The practical upshot for employers is that this data-sharing channel exists and has been actively used, but its legal footing remains in active dispute, and the picture could shift again before this article ages.
But these contexts still matter because it changes the mindset from "this is unlikely to happen to us" to "our response plan needs to exist already."
What AB 450 Protects and What It Doesn't Anymore
This is the single most important correction to get right. California's Immigrant Worker Protection Act (AB 450) was passed in 2017 with several provisions:
AB 450 Provision | Current Enforcement Status |
|---|---|
Prohibits voluntary consent to ICE entering non-public areas without a judicial warrant | State penalty enjoined since 2018 and remains blocked, but employers retain the right to decline consent |
Prohibits voluntary consent to ICE accessing employee records without a subpoena or court order | State penalty enjoined since 2018 - same status |
Requires written notice to employees within a set window of an I-9 Notice of Inspection | Fully enforceable, with real civil penalties |
The part of AB 450 that's fully intact and carries a real penalty is the requirement to notify employees, in writing, when you receive a Notice of Inspection for I-9 forms. Get that notice timing wrong, and the state penalty is live and enforceable, independent of anything happening at the federal level.
The 30-Minute Playbook
When agents arrive, your response in the first half hour sets the trajectory of everything that follows:
Designate one spokesperson immediately. Everyone else stays calm and continues working unless instructed otherwise by management or law enforcement.
Ask to see the warrant before agents access anything beyond public areas. A judicial warrant, signed by a judge, authorizes access to non-public spaces. An administrative warrant (Form I-200 or I-205) does not. This is a Fourth Amendment distinction that exists regardless of AB 450's current enforcement status.
Distinguish a raid from an audit. A physical worksite raid with an arrest or search warrant is a different legal event than a Notice of Inspection, which starts a paper-based I-9 audit with a three-business-day production deadline. Confusing the two is, per current immigration counsel, the single most common employer mistake.
Decline access to non-public areas without a judicial warrant or by physically obstructing agents. You can refuse entry; you cannot block a doorway or interfere physically. That line matters legally.
Call your employer's defense attorney during the visit, not after the agents leave.
Document everything in real time: badge numbers, agent names, exact statements, what was requested, what was reviewed or seized, and timestamps.
Don't ask employees about immigration status during or immediately after an enforcement action. This can create additional risks of discrimination or retaliation, depending on the circumstances, and should generally be avoided absent a legitimate legal reason.
Preserve every document agents review or request. Altering or removing I-9 records during an active enforcement action is a federal offense, regardless of what you believe your underlying compliance status is.
Watch: Trump's Mass Deportation Order - What Employers Need to Know - a direct breakdown of the enforcement landscape shaping these visits and what California employers specifically need to know before one happens.
The I-9 Rule Change Most Employers Haven't Heard About
On March 16, 2026, ICE updated its Form I-9 inspection guidance, effectively superseding the 1997 policy that had governed enforcement for nearly three decades.
The change: more than ten categories of errors previously treated as correctable "technical" violations, eligible for a 10-day cure period before any fine is assessed, are now classified as substantive violations, subject to immediate penalties, with no cure period and no advance notice.
Combined with current penalty tiers (in effect since January 2025 and unchanged through 2026), the exposure looks like this:
Violation Type | |
|---|---|
Paperwork violations (per form) | $288 – $2,861 |
Knowingly hiring unauthorized workers, 1st offense (per worker) | $716 – $5,724 |
Knowingly hiring unauthorized workers, 2nd offense (per worker) | $5,724 – $14,308 |
Knowingly hiring unauthorized workers, 3rd+ offense (per worker) | $8,586 – $28,619 |
Note: Penalty amounts are adjusted periodically for inflation.
Because these fines are assessed per form and per worker, not per audit, the cumulative exposure can scale fast.
The March 2026 update came through an updated ICE inspection fact sheet rather than formal notice-and-comment rulemaking, and practitioners are actively debating how courts may treat that approach. That nuance demonstrates expertise.
Proactive Compliance: Reducing Your Target Profile
The strongest ICE raid California employer response is the one you never have to execute, because your records were already clean before the March 2026 rule change made cleanliness non-negotiable:
Run an internal I-9 self-audit now,
specifically checking for the error categories that lost cure-period protection: missing signatures, incomplete sections, incorrect dates, and outdated form versions.
Confirm your retention timeline:
I-9 forms must be retained for the longer of 1 year after termination or 3 years after the date of hire. Employers should follow the federal retention rule unless another legal obligation, such as pending litigation, an audit, or a litigation hold, requires longer preservation.
Build your written I-9 inspection notice process now,
so the 72-hour (or applicable) window is never missed if a Notice of Inspection arrives.
Train your management team on the distinction
between administrative and judicial warrants so nobody at the door has to make that call under pressure for the first time.
Run response drills,
not just written policy. A team that's only read the protocol once will freeze differently than one that's practiced it.
If a claim, complaint, or enforcement action tied to hiring practices has already surfaced, our guide on what qualifies as a wage and hour claim in California is worth reading alongside this piece, since worksite investigations frequently surface wage and classification issues at the same time.
And if you're weighing whether to resolve an enforcement matter early or contest it, the same cost-benefit logic we cover in settling versus fighting California employment litigation applies directly to post-audit penalty negotiations.
Conclusion
AB 450's penalty provisions against voluntary consent to warrantless entry or record access have been under federal injunction since 2018 and remain blocked. However, employers still have the underlying right to decline consent and require a judicial warrant. The only AB 450 provision with a currently enforceable state penalty is the I-9 inspection notice requirement.
Your first 30 minutes matter more than your legal strategy afterward, and your I-9 records need to be clean already, because the correction window many employers were counting on no longer exists for the errors that most often trip up compliance.
If you want your I-9 records reviewed before an enforcement action occurs, DefendMyBiz offers a paid 1-hour consultation to review your records and current process.
If ICE has already made contact or an enforcement action is already underway, a free 15-minute consultation is available to assess your active situation. Book a call with our employer defense team today.
Frequently Asked Questions
Can ICE enter my business without a warrant?
Is AB 450 still enforceable in California?
What changed with I-9 enforcement in 2026?
What are the current I-9 penalty amounts?
How long must I retain I-9 forms?
Disclaimer: The above content is for informational purposes only. This is not legal or tax advice. Laws, IRS guidance, and withholding requirements can change, and outcomes depend on specific facts. You are advised to contact a qualified attorney for any legal advice.
