<Li> Date of Issue </Li> <Li> Date of Expiration </Li> <P> The machine - readable zone is present at the bottom of the page and contains P <USA (SURNAME) <<(GIVEN NAME (S)) <<<<<<<<<<in the first line and (PASSPORT NO . + 1 DIGIT) USA (DATE OF BIRTH + 1 DIGIT + SEX + DATE OF EXPIRATION + 10 DIGITS) <(6 DIGITS) in the second line . Both lines contain 44 characters in a fixed - width all - caps font, with the top line ending with enough left angle brackets to fill the 44 character limit . </P> <P> A signature page has a line for the signature of a passport holder . A passport is not valid until it is signed by the passport holder . If a holder is unable to sign his passport, it is to be signed by a person who has legal authority to sign on the holder's behalf . </P>

How many numbers are in a us passport
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