Few outside the IRS are fans of FATCA, the Foreign Account Tax Compliance Act. That's especially true of those outside the U.S. It's no surprise that American Citizens Abroad (ACA) has launched a campaign to repeal FATCA, and their paper can be found here. In a letter to Treasury Secretary Geithner and IRS Commissioner Shulman, the organization claims FATCA works against the interests of the U.S.