On Thursday, the TSA filed a notice to implement an $18 fee for travelers who show up at the airport without a valid Real ID-compliant document. In the filing, the government agency said the fee would cover the cost of identifying passengers who require additional screening.

The Transportation Security Administration has proposed a rule that would charge travelers who lack a Real ID an $18 fee at security checkpoints, according to a notice published Thursday in the Federal Register.

Travelers who arrive at a U.S. airport security checkpoint without a REAL ID or a valid passport could be required to pay an $18 fee to make their flight, according to a proposed rule by the Transportation Security Administration.

A new program from the Transportation Security Administration will charge travelers $18 to pass through airport security if they are not carrying valid identification, such as Real ID or a passport.

The TSA intends to create a registration program for flyers who don't have a Real ID or an accepted alternative.

TSA is proposing an $18 fee for travelers without proper ID, covering enhanced screening costs. Passports, military IDs and REAL ID licenses qualify.

The fee would affect domestic travelers in the U.S. and signals a broader move toward enhanced security measures at airports.