The federal government may revoke or deny passports for Americans with "seriously delinquent tax debt" over $62,000, a threshold adjusted annually for inflation. This enforcement measure has become more frequent as a last resort to compel tax payments. Revoked passports can disrupt travel, particularly for those living or working abroad. Taxpayers often only learn of passport revocation when attempting to travel, sometimes due to missed IRS notices. Revoking a passport is a last resort for the government after all other typical IRS collection efforts, such as federal tax liens, have been exhausted.