The Trump administration’s attempt to defend the transfer of confidential taxpayer information to immigration authorities received a stinging response from a federal appeals court Tuesday.
“Weak sauce.”
That was how a three-judge panel on the U.S. Court of Appeals for the D.C. Circuit described the administration’s argument that an injunction restricting data transfers between the Internal Revenue Service and the Department of Homeland Security could expose sensitive criminal investigations.
The dispute involves the IRS allegedly disclosing taxpayer addresses to Immigration and Customs Enforcement tens of thousands of times as part of Donald Trump’s mass-deportation campaign.
A lower court found that the IRS violated federal disclosure rules approximately 42,695 times by releasing addresses even when ICE requests failed to satisfy the legal requirements governing access to confidential tax information.
The administration appealed—but the judges appeared deeply unconvinced by one of its central objections.
Tax information allegedly disclosed 42,695 times
The legal fight began after the IRS started sharing taxpayer information with DHS in an effort to help immigration authorities identify and locate undocumented immigrants.
The policy was initiated in June 2025 under then-IRS Commissioner Billy Long.
It immediately generated serious privacy concerns and bipartisan criticism. Tax information is ordinarily protected by strict confidentiality rules, in part to encourage people to file accurate returns without fearing that the information will be freely circulated among law-enforcement agencies.
The Center for Taxpayer Rights filed a lawsuit seeking to stop the transfers.
A federal judge later concluded that the IRS had violated its own disclosure requirements “approximately 42,695 times,” with each improperly released address representing a separate alleged violation.
The court’s findings suggested that the safeguards intended to protect taxpayer confidentiality had become little more than a formality.
ICE allegedly supplied meaningless addresses
Under the relevant rules described in the case, the IRS cannot simply provide a taxpayer’s location whenever another agency requests it.
The requesting agency must first demonstrate that it already possesses an address for the individual being investigated. Only after meeting that condition may it seek assistance from the IRS under the applicable legal process.
But according to the lower court, enforcement of that requirement became extraordinarily lax.
ICE allegedly could have submitted an obviously meaningless entry such as “Don’t Care 12345” or “00000” and still received a taxpayer’s real address from the IRS.
That finding cut to the heart of the lawsuit.
If agencies can satisfy a statutory prerequisite with nonsense information, the requirement no longer operates as a meaningful safeguard. It becomes a box to check before confidential data is released.
The lower court imposed an injunction intended to prevent the IRS from continuing the practice without complying with the law.
Administration claims injunction is harmful
Government attorneys appealed, describing the order as “highly unusual and harmful.”
They argued that requiring the IRS to notify the court before making certain disclosures could reveal the existence of secret criminal investigations.
In their view, advance notification might compromise sensitive operations by forcing the government to disclose investigatory activity that would normally remain confidential.
But the appeals court panel pointed to a simple feature of the lower court’s order that appeared to undermine that concern: The IRS is permitted to submit its notices under seal.
Documents filed under seal are withheld from public access. That means the government can inform the judge without revealing the underlying investigation to taxpayers, reporters or the general public.
“That argument is weak sauce,” the panel wrote, “where the district court has permitted the IRS to file any necessary notifications ‘under seal,’ thereby shielding any criminal investigative activity from disclosure.”
The phrase was unusually blunt for a federal appellate decision—and instantly transformed a technical privacy dispute into a public humiliation for the administration’s legal team.
IRS employees warned of serious consequences
The appeals court also emphasized the legal danger facing government employees who improperly release protected taxpayer information.
IRS personnel may face “steep civil and criminal consequences” if they continue providing confidential information to DHS in violation of federal law, the panel declared.
That warning raises the stakes for individual officials asked to participate in the data-sharing system.
The controversy is not merely an administrative disagreement about paperwork. Unauthorized disclosure of tax information can expose federal employees to personal legal liability.
The panel’s language therefore serves as more than criticism of the administration’s appellate argument. It also warns IRS personnel that following questionable directives may carry consequences for them individually.
Billy Long removed after only two months
Long’s role in launching the data-sharing practice became part of a broader controversy surrounding his brief tenure at the IRS.
He was removed from the agency roughly two months after initiating the policy. The supplied report says the administration acted partly to contain the taxpayer-data controversy, while Treasury officials also reportedly questioned his competence.
Soon afterward, Trump appointed Long as U.S. ambassador to Iceland.
His departure did not end the legal battle over the policy he helped establish. The lawsuit continued as courts examined whether the administration had turned confidential IRS records into an enforcement tool for its immigration agenda.
A major test of taxpayer privacy
The case could have implications far beyond the individuals whose addresses were allegedly disclosed.
America’s tax system depends partly on public confidence that sensitive financial and personal information will not be repurposed without strict legal authorization.
If taxpayers fear that filing a return could help another agency locate them, that trust could erode—especially in immigrant communities.
The administration maintains that the injunction interferes with legitimate government investigations. Its challengers argue that immigration enforcement does not permit the executive branch to disregard legal protections surrounding tax records.
The appeals court has not reduced that conflict to a final two-word resolution. But on one key argument, its position could hardly have been clearer.
The Trump administration warned that sealed court notifications would expose secret investigations.
The judges examined that claim—and called it “weak sauce.”
