The United States Department of the Treasury has quietly signaled support for controversial new legislation that would bar individuals living in the country illegally from accessing the U.S. banking system. This bold move, aligned with the Trump administration’s broader immigration strategy, is already stirring debate in Washington, in banking circles, and among immigrant rights advocates. The proposal could reshape who can open or maintain financial accounts in America.
What the Legislation Would Do
At the center of the discussion is the Know Your American Customer Act, introduced in March 2026 by Senator Tom Cotton, a Republican from Arkansas. The bill would change long-standing banking practice by requiring banks and credit unions insured by federal agencies such as the Federal Deposit Insurance Corporation and the National Credit Union Administration to verify the legal status of new customers before approving account openings. Under the bill’s language, financial institutions would confirm whether a person is a U.S. citizen, a lawful permanent resident, or legally present on a valid visa. Existing account holders would be “grandfathered” in, meaning their accounts could stay open even if they lack the newly required verification. The bill would also make it a federal crime for someone in the country illegally to open or maintain an account at covered institutions if they fail to prove legal status.
Senator Cotton framed the bill as a matter of national sovereignty and legal integrity, asserting that access to the American financial system should be “a privilege reserved for those who respect our laws.” His office has emphasized that this measure is designed to ensure that American banks are not used by illegal migrants to “establish financial roots” in the country without legal authorization.
Treasury’s Position and Broader Policy Context
While there has been no formal public announcement in a press release, multiple reports indicate that officials within the U.S. Treasury have expressed broad support for the bill’s goal of tightening controls on financial access for individuals without legal status. The Treasury’s alignment reflects a larger strategy by the Trump administration to use all available tools to curb illegal immigration, extending beyond border enforcement to internal systems such as banking and financial services.
This shift comes as the administration reportedly considers even more aggressive measures. Media reports earlier this year suggested the White House was internally weighing an executive order or regulatory action that could require banks to collect citizenship information from customers—a step that does not yet have official confirmation but reflects the same policy impulse. Under current federal law, banks collect basic identity information as part of anti-money laundering rules, but they are not required to verify citizenship status specifically when opening accounts.
Financial regulators such as the Treasury’s Financial Crimes Enforcement Network already oversee rules that require banks to verify customers’ identities to prevent illicit finance, but these rules focus on identity and fraud prevention, not immigration status. Any changes to mandate citizenship or legal presence verification could mean banks would have to ask for new kinds of documentation, such as passports, that aren’t currently required by law.
Banking Industry Reactions and Legal Questions
The banking industry has expressed a mix of concern and uncertainty about proposals to require verification of legal status. Many financial institutions already ask for identification under “Know Your Customer” and Customer Identification Program (CIP) requirements designed to prevent money laundering and financial crime, but these regulations do not distinguish between citizens and non-citizens as a basis for account eligibility. If banks were required to collect proof of legal status, institutions could face significant operational challenges. Critics warn that such changes could lead to administrative burdens, possible retroactive document collection from existing customers, and even the closure of accounts for individuals who fail to provide new documentation promptly.
Legal experts also question whether the executive branch has the authority to compel banks to take on immigration enforcement roles without clear congressional authorization. Issuing new requirements that banks must verify citizenship or legal status could invite lawsuits over regulatory overreach or conflicts with existing federal statutes governing financial practices.
Supporters’ Views and Political Implications
Proponents of the bill argue that U.S. immigration laws mean little without enforcement within key systems such as banking. They say that allowing individuals in the country illegally to maintain access to financial infrastructure undermines both legal immigration pathways and national security. Groups advocating stricter immigration enforcement have called for closing what they view as loopholes in how financial institutions handle foreign identification documents.
Senator Cotton’s effort comes amid a broader, politically charged debate in Washington over immigration policy. The Trump administration’s intensified focus on immigration enforcement has included expanded deportation efforts, attempts to tighten access to public benefits, and proposals to require more stringent documentation across various government systems. These moves have drawn both praise from supporters and harsh criticism from civil liberties and immigrant rights groups, who view them as punitive, discriminatory, and harmful to communities that rely on access to banking services.
What Comes Next
The Know Your American Customer Act is still in its early stages. It must pass through committees in the U.S. Senate and House before it can reach President Trump’s desk for a signature. The Treasury’s supportive posture signals momentum within parts of the federal government for such measures, but significant debate lies ahead both in Congress and in the courts. Banking industry stakeholders, civil rights advocates, and immigration policy experts are likely to intensify their advocacy and legal analysis as the legislative process unfolds.
If enacted, the bill could fundamentally alter access to the U.S. banking system for millions of residents who are not U.S. citizens. It would mark a rare expansion of immigration enforcement into the financial regulatory sphere, raising questions about enforcement, implementation, and the ethical balance between national security and inclusion.
