Short answers, pulled from the story.
The modern passport was universally adopted and standardized in 1920, following the League of Nations' Paris Conference on Passports and Customs Formalities and Through Tickets. Follow-up conferences in 1926 and 1927 refined the guidelines further. Machine-readable passport standards came in 1980 under the ICAO.
A biometric passport contains an embedded RFID microchip that stores the holder's facial image, fingerprints, and other identifying data, along with a digital signature to verify the document's integrity. As of July 2024, over 150 jurisdictions issue biometric e-passports.
As of 2026, the Singaporean passport holds the highest mobility score, meaning its holders can enter the greatest number of countries for general tourism visa-free, via visa on arrival, via electronic travel authorization, or via an eVisa issued within three days.
The League of Nations issued Nansen passports to stateless refugees from 1922 to 1938. They were humanitarian travel documents designed for people who had no state willing to certify their identity and nationality.
One of the earliest known references is found in the Hebrew Bible at Nehemiah 2:7-9, dating from approximately 450 BC. It describes Nehemiah, an official of King Artaxerxes I of Persia, receiving a letter requesting safe passage from the governors of lands he would travel through on his way to Judea.
Passport fraud is a federal crime in the United States. Convictions can result in fines up to $250,000 and prison sentences of between 10 and 20 years, depending on mitigating factors. The Diplomatic Security Service investigates cases in coordination with law enforcement agencies in over 160 countries.