This legislation, titled the "No Paydays for Hostage-Takers Act," establishes a United States policy to undertake additional actions and impose strict penalties to deter hostile governments and non-state actors, especially the Government of Iran, from hostage-taking or wrongfully detaining United States nationals. The bill requires the President to submit a report every 180 days for six years on the $6 billion in restricted Iranian funds transferred to Qatar. This report must include an itemized list of all transactions, the quantity of funds remaining, and a thorough description of the United States Government's process for verifying that transactions were humanitarian in nature. It also mandates certifications on whether credible evidence exists that these funds have been used for non-humanitarian purposes or have enabled Iran to increase spending on defense, intelligence, or malign foreign activities. Furthermore, the Act directs the President to conduct annual reviews for six years of all cases of hostage-taking or wrongful detention of United States nationals in Iran over the preceding decade. Based on these reviews, the President must determine if any foreign person is responsible or complicit and report to Congress whether sanctions under the Robert Levinson Hostage Recovery and Hostage-Taking Accountability Act have been imposed or waived, providing justification for any waivers. The legislation also addresses the travel of Iranian diplomats to the United Nations, stating that Iran's history of hostage-taking and malign activities should be a primary consideration in limiting their admission. It amends existing law to deny visas to individuals sanctioned for terrorism or weapons proliferation. An annual report for three years is required on actions taken to restrict such travel and identify instances of visa denials. Additional provisions include annual reports for three years on blocked Iranian assets globally, detailing any changes in their status and U.S. government involvement, including any waivers of sanctions. Congress expresses a sense that the U.S. should lead coordinated international efforts to find, freeze, and seize assets of individuals and entities sanctioned in connection with Iran's malign activities. Finally, the bill directs the Secretary of State to determine and report annually for three years whether travel to Iran presents an imminent danger to United States travelers and if authority is being exercised to declare United States passports invalid for such travel. It also requires the President to develop and submit a comprehensive strategy to deter and prevent wrongful detention and hostage-taking by adversaries, outlining penalties, policies against ransom payments, and plans for coordination with allies.