The False Claims Act Amendments of 1986, enacted on October 27, 1986, represent a significant overhaul of the original False Claims Act (1863) aimed at combating fraud against the U.S. government. Sponsored primarily by Senator Charles Grassley (R-IA) and Representative Howard Berman (D-CA), the amendments strengthened whistleblower protections and revitalized qui tam provisions, allowing private citizens to file lawsuits on behalf of the government and receive a share of recoveries (15-30% of proceeds). Key changes included permitting the government to seek treble damages, eliminating government control over qui tam suits in certain cases, and addressing weaknesses in the original FCA that had been created by court interpretations. The legislation was motivated by concerns over defense contractor fraud during the Cold War era and is codified at 31 U.S.C. §§ 3729–3733, with legislative history in Senate Report No. 99-345 (1986). Since enactment, the amendments have dramatically increased recoveries from false claims against the U.S., with the Department of Justice reporting over $30 billion recovered by 2011 and cumulative whistleblower awards exceeding $8.619 billion since 1987. The qui tam mechanism accounts for nearly 70% of civil fraud recoveries, making the FCA a cornerstone of U.S. anti-corruption efforts in sectors like healthcare, defense, and procurement. The amendments have also inspired similar state and local FCAs nationwide. While facing some criticism for potentially encouraging frivolous lawsuits, their effectiveness in deterring fraud and recovering funds is widely acknowledged, with ongoing evolution through judicial interpretations and legislative tweaks.