In 2014, at the behest of Rep. Alan Grayson (D-Fla.), the DOT’s Office of Inspector General began an audit of U.S. frequent flyer programs, and the DOT’s monitoring thereof, with a particular focus on unfair and deceptive practices (summary, with a link to the full .pdf report, here). The audit results were published this month, with the following headline: “Improvements needed in DOT’s process for identifying unfair or deceptive practices in airline frequent flyer programs.”