An expiration date (EXP.) is a set date on which a document is no longer valid. Every document, with the exception of the Diplomatic Authorization, has an expiration date. Discrepancies regarding the date can be highlighted with the document in question and the date and time in the inspector's booth. If there is a discrepancy, the entrant cannot change the mistake, and to avoid getting a citation the inspector must either deny or detain the entrant.
The format of the date depends on game settings and can be year-month-day, day-month-year or month-day-year.