US passport number, one uppercase letter then eight digits. Noisy by nature: any reference code of that shape matches, for example an invoice number. Pair it with a whitelist, or keep it for documents where a passport is expected.
Label: US_PASSPORT
\b[A-Z]\d{8}\bPassport C12345678 expires in 2031. → C12345678Travel document: X98765432 → X98765432C123456789c12345678Tags: us, government-id, identity