Kansas v. Garcia
The Supreme Court ruled that Kansas could prosecute three unauthorized immigrants for identity theft based on false Social Security numbers they put on tax-withholding forms, rejecting the argument that federal immigration law blocked those prosecutions.
The decision clarifies that federal restrictions on how work-authorization paperwork may be used do not extend to tax-withholding forms, preserving states' power to enforce identity theft and fraud laws in this context.
How it got here: Three workers were convicted in Kansas trial courts; the Kansas Court of Appeals affirmed; a divided Kansas Supreme Court reversed on preemption grounds; Kansas petitioned and the Supreme Court agreed to hear the case.
The Case in Depth
What happened
Three unauthorized immigrants obtained jobs in Kansas by writing stolen Social Security numbers on their federal and state tax-withholding forms (W-4 and K-4). They had used the same stolen numbers on their federal work-authorization forms (I-9). The real owners of those Social Security numbers did not know their numbers were being used; in one case, income the victim never earned was being reported under her number. Kansas convicted all three under its identity theft and fraud statutes.
The question before the Court
Can Kansas use its identity theft law to prosecute unauthorized immigrants who used a stolen Social Security number on tax-withholding forms, even though federal immigration law restricts how that same number may be used on federal work-authorization forms?
The Court's answer
No — Kansas can prosecute unauthorized workers who used stolen Social Security numbers on tax-withholding forms, and federal immigration law (IRCA) does not block those prosecutions. The provision of IRCA that restricts use of information "contained in" an I-9 form does not extend to the same data when it appears independently on a different form — just as using someone's email address from one source does not mean you are drawing it from every other document that also lists that address. Tax-withholding forms and I-9 forms serve completely different purposes, and IRCA's detailed rules for the work-authorization system do not sweep in unrelated forms.
Implied preemption does not apply either. Unlike a prior ruling (Arizona v. United States) where Congress had deliberately chosen not to criminalize unauthorized work, here Congress actually made it a federal crime to lie on a W-4 — so no congressional decision shields this conduct from state prosecution. And the Supremacy Clause gives priority to laws Congress enacted, not the enforcement preferences of federal prosecutors.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
States may continue enforcing identity theft and fraud laws against workers who use stolen Social Security numbers on tax forms, even when those workers submitted the same information on federal work-authorization paperwork. Real victims of Social Security number theft — who can have false income wrongly attributed to them, affecting tax records and government benefits — retain the protection of state criminal law.
What changes now
The three convictions — overturned by the Kansas Supreme Court — are reinstated and the cases return to Kansas courts for further proceedings. Kansas and other states may continue bringing identity theft and fraud prosecutions against workers who used stolen Social Security numbers on tax-withholding forms. Future cases raising preemption where a prosecution's theory more directly targets misrepresentation of work-authorization status rather than tax-form fraud could present different questions not resolved here.
What this does not decide
The ruling does not resolve whether a state prosecution would be preempted if its theory directly targeted a worker's misrepresentation of work-authorization status — rather than tax-form fraud — to get a job. Justice Breyer's dissent argues this distinction is illusory in practice, leaving that question open for future cases.
Concurrences and dissents
Concurrence — Justice Thomas
Justice Thomas agreed with the majority's result and joined its opinion in full, but wrote separately to argue the Court should explicitly abandon 'purposes and objectives' preemption — the doctrine allowing courts to invalidate state laws that conflict with broad federal policy goals even when no direct textual clash exists. In his view, the Supremacy Clause's original meaning only displaces state law when federal and state law are in direct logical contradiction, and judicial guesswork about legislative intent has no place in preemption analysis.
Dissent in part — Justice Breyer
“By permitting these prosecutions, the majority opens a colossal loophole.”Breyer warning that the ruling lets states police work-authorization fraud through tax forms, effectively circumventing federal preemption.
Justice Breyer agreed that IRCA does not expressly preempt the Kansas laws but would have found that federal law impliedly occupies the narrow field of prosecuting fraud committed to demonstrate federal work authorization. He argued that IRCA's intricate verification scheme and its express prohibition on states using I-9 information together signal that only the federal government may prosecute workers for misrepresenting their immigration status to get a job. He pointed to the Morales trial, where Kansas argued Morales intended to deceive his employer about his legal status, as falling squarely within that preempted field — regardless of which forms the State relied on at trial.
How the Court got there
The legal reasoning, step by step
- IRCA's explicit preemption provision only applies to state laws that punish employers who hire unauthorized workers — it says nothing about state laws targeting the workers or job applicants themselves. That provision therefore had no bearing on the Kansas prosecutions, which targeted the employees, not their employers.
- The Kansas Supreme Court instead relied on a separate IRCA provision (§1324a(b)(5)) barring anyone from using information 'contained in' an I-9 for purposes other than a short list of federal laws. The majority rejected this reading: a piece of information — unlike a physical object — can exist in many places at once, and using it on a different form does not mean you are drawing it 'from' the I-9. The Court illustrated this with an analogy: a student who writes about the moon landing is not using any specific newspaper's coverage unless that is where she got the fact.
- The Court separately rejected the argument that tax-withholding forms are part of the 'federal employment verification system,' which IRCA restricts from use in most law enforcement. That system has one function: confirming a worker is authorized to work in the United States. Tax-withholding forms (W-4s and K-4s) serve income-tax enforcement and can be updated at any time — they play no role in determining work authorization.
- On implied field preemption — the theory that IRCA silently reserves an entire subject area for the federal government alone — the Court found no basis. Tax-withholding forms are fundamentally unrelated to work-authorization verification. IRCA does not create a comprehensive federal scheme governing every piece of information employees must supply when starting a job; it plainly does not prevent states from requiring teachers to show valid teaching certificates, for example.
- On conflict preemption — the theory that Kansas law clashes with Congress's intentions — the Court distinguished its earlier ruling in Arizona v. United States (2012), where a state law criminalized unauthorized work that Congress had deliberately chosen not to punish. Here, Congress actually made it a federal crime to lie on a W-4 (26 U.S.C. §7205), so no inference arises that Congress meant to leave this conduct free from prosecution.
- Finally, the Court held that federal enforcement priorities and prosecutorial preferences cannot by themselves preempt state law. The Supremacy Clause makes enacted federal statutes supreme — not the choices federal prosecutors make about which cases to pursue. In fact, federal authorities participated in all three investigations and supported Kansas before the Court.
Doctrinal impact
Cases affected by this decision
Distinguishes Arizona v. United States (567 U. S. 387)
Unlike Arizona — where Congress chose not to criminalize unauthorized work — Congress here made lying on a W-4 a federal crime, so no conflict preemption arises.