(This measure has not been amended since it was reported to the House on June 2, 2017. The summary of that version is repeated here.) Verify First Act (Sec. 2) This bill amends the Internal Revenue Code to prohibit advance payments of the premium assistance tax credit from being made to an individual unless the Department of the Treasury has received confirmation from the Department of Health and Human Services that the Social Security Administration or the Department of Homeland Security has verified the individual's status as a citizen or national of the United States or an alien lawfully present in the United States. The verification process must include the appropriate use of information related to citizenship or immigration status, such as Social Security numbers (but not individual taxpayer identification numbers). The bill also amends the Public Health Service Act and the Patient Protection and Affordable Care Act to permit adjustments to certain health insurance coverage dates for an individual whose eligibility for advance payments is delayed due to the verification requirements. The bill is contingent on the enactment of the American Health Care Act of 2017 (AHCA). If the AHCA is enacted, the bill applies to: (1) the existing tax credit after December 31, 2017; and (2) the tax credit, as modified by the AHCA, after December 31, 2019.