The Tampa Bay Times has done some excellent investigative reporting on the 50 worst charities in America — organizations that took in more than $1 billion over the past 10 years, and gave almost all of that money to their own staffs and professional solicitors. The series explains how charities like this operate and skirt the regulatory system. But if you’re feeling TLDR, there’s also a PDF that can help you quickly figure out if you’re donating to one of these scams. A large portion of the 50 worst is made up of charities devoted to cancer and veterans’ issues.