Short answer: You canu2019t.Here is why:u201cTerrorist watchlistsu201d in the United States are generated by the aptly named Terrorist Screening Center (TSC).The Terrorist Screening Center is a multi-agency government entity administratively controlled by the FBI. According to their website, they are u201cthe U.S. Governmentu2019s consolidated counterterrorism watchlisting component.u201dThey are responsible for the compilation and evaluation of the Terrorist Screening Database, more commonly referred to as the u201cterrorist watchlist.u201d If anyone would know if you were on the watchlist it would be these folks because they would be the ones who put you there.According to the TSC, the watchlist is u201ca single database that contains sensitive national security and law enforcement information concerning the identities of those who are known or reasonably suspected of being involved in terrorist activities.u201dThe watchlist is used to support front line screening agencies (such as the TSA) u201cin positively identifying known or suspected terrorists who are attempting to obtain visas, enter the country, board an aircraft, or engage in other activities.u201dNow that we have that bit of background information out of the way, your question is really about how to prove you are on a terrorist watchlist. The TSC will have no comment on that.The Department of Homeland Security maintains what they call the Traveler Redress Inquiry Program (DHS TRIP). Traveler Redress Inquiry Program (DHS TRIP) Any inquiries about the list or difficulties you feel you may have encountered from possibly being named on the list should be directed to them. I wouldnu2019t count on getting a satisfactory answer though.**Friendly TSA agents ready to help.The Terrorist Screening Database, as you might suppose, is culled from classified intelligence and/or sensitive law enforcement information. The Terrorist Screening Center refuses to confirm or deny the inclusion of any individual on the watchlist for reasons of national security.