Beginning January, 2018, U.S. citizens with unpaid taxes may find their U.S. passport applications denied and their existing passports revoked. The I.R.S. announced that it will begin implementation of procedures to notify the State Department of taxpayers the I.R.S. certifies as owing a “seriously delinquent tax debt.” This may come as a rude awakening to many Americans, although both the press and television news issued warnings going back more than a year ago.