Oklahoma House Bill 1804, officially known as the Oklahoma Taxpayer and Citizen Protection Act 2007, is a strict anti-illegal immigration law introduced by State Representative Randy Terrill, a Republican from Moore, OK. HB-1804 makes it a felony even to give a person a ride if they know or have grounds to suspect them of being an illegal immigrant.

The State of Oklahoma also finds that other measures are necessary to ensure the integrity of various governmental programs and services.Section 3 of HB1804 makes it a felony in Oklahoma, punishable by no less than one year's imprisonment by the Oklahoma Department of Corrections or/and a $1,000 fine, to: Section 4 of HB1804 prevents any State agency, local government, or public school district from issuing any form of identification card to an illegal alien, including voter ID cards, driver licenses, and birth certificates.

Any false affidavit constitutes perjury punishable by imprisonment by the Oklahoma Department of Corrections for up to 5 years.

In October 2007, the National Coalition of Latino Clergy filed a federal lawsuit, seeking to overturn the bill on the grounds that it was unconstitutional and violated rights to due process, but this was finally dismissed in December 2007 because the plaintiffs named in the suit didn't have standing to challenge the law.

[3] In November 2007, CNN reported that many in Oklahoma's Latino community were staying home, fearful that police would arrest and deport them, and that this was impacting heavily on local businesses.

[5] In December 2012, a final judgment was entered in the case following an appellate ruling, which preserves the requirement for government contractors to participate in E-Verify, but strikes the tax penalties for unverified independent contractors in Section 9 and the discrimination liability for retaining illegal aliens from Section 7.