Air travelers without a REAL ID-compliant form of identification will be required to pay a $45 fee to pass through airport security starting on Feb. 1.

Under the new policy, travelers who hold an older form of ID will be required to pay the fee on pay.gov and show a receipt at an initial Transportation Security Administration checkpoint, the agency said Monday. They will then need to confirm their identity through a TSA system known as TSA Confirm ID, which can check a person’s identity against passport data and other personally identifying information.