What Is a Passport Bio Page and What’s on It?

The passport bio page is the plastic data page inside the front of your U.S. passport book that carries your photo, personal details, and the machine-readable code border agents use to confirm your identity. It is the single most important page in the book, and its condition and accuracy determine whether you can travel. On U.S. passports issued since 2021, this page is made of polycarbonate plastic with information laser-engraved into the material rather than printed on paper.¹

What’s Printed on the Page

The bio page shows your full legal name, a color photograph, date of birth, place of birth, sex, and nationality. It also lists the passport number, the date of issue, the expiration date, and the issuing authority. On next-generation books, the passport number begins with a letter followed by eight digits in the top right corner of the page.¹

When your passport arrives, sign it in blue or black ink. For a child under 16, a parent prints the child’s full name on the signature line, signs next to it, and writes the relationship, such as “mother” or “guardian.” Do not write on any other page besides the signature line and the emergency contact section. Extra markings elsewhere can invalidate the book.²

The Two Lines of Code at the Bottom

Those two rows of characters running across the bottom of the page are the machine-readable zone, or MRZ. They follow a global format set by the International Civil Aviation Organization in Document 9303, which every passport-issuing country uses. The first line encodes a document code beginning with “P,” a three-letter country code, and your name. The second line packs in the passport number, nationality, date of birth, sex, expiration date, and several check digits that let scanners catch errors instantly.³

That code is what lets a border agent scan your passport and pull up your information in seconds. If the MRZ gets scratched, stained, or smudged badly enough to be unreadable, expect real delays at immigration.

Security Features

The polycarbonate construction is the biggest change from older U.S. passports. Because your details are laser-engraved into the plastic rather than printed and laminated over, they can’t be scraped off or chemically altered without visibly destroying the page.¹ The page also carries holograms that shift at different angles, microprinting, UV-reactive inks, and embedded watermarks.

Most passports issued today are e-passports with a small chip in the book. The chip stores a digital copy of your facial photograph and the same data printed on the bio page, so an agent can compare the printed page against the stored version to confirm nothing has been altered.

Why the Expiration Date on the Page Matters

Many countries will not admit you unless your passport stays valid for at least six months beyond your travel dates, and some airlines enforce that rule at the gate and refuse to board you.² A passport that technically has four months of validity left is not enough for much of Europe, Asia, or South America. Check your destination’s entry rules before booking.

U.S. passports for adults 16 and older are valid for 10 years. Passports for children under 16 are valid for five.⁴ Combine the shorter child validity with the six-month rule and families need to check expiration dates well ahead of any international trip.

When Damage Forces a Replacement

Normal wear is fine. A slight bend from a back pocket, or pages that fan out from use, will not invalidate the book. Certain damage will:

Water damage, mold, or stains affecting the data page
A significant tear beyond minor surface wear
Unofficial markings on the data page, including stickers, doodles, or stamps from non-immigration authorities
Missing visa pages that have been torn, ripped, or cut out
A hole punch through the book

If any of those apply, you can’t renew by mail. You apply in person on Form DS-11, submit the damaged passport with a signed statement explaining what happened, provide a new photo, and pay both fees. For an adult book that’s $130 for the application plus a $35 acceptance facility fee, or $165 total. A child’s book is $100 plus the $35 facility fee.⁵ DS-11 applications take longer than a standard renewal, so start early.⁴

Fixing Errors on the Page

If your passport arrives with a misspelled name, wrong date of birth, or another printing error, the State Department corrects it at no charge. You submit Form DS-5504 by mail with your current passport, a new photo, and evidence of the correct information, such as a birth certificate.⁶

Timing changes what you get back. Report the error within one year of the issue date and the corrected replacement is valid for a full 10 years. Report it after one year and the replacement only runs to the original expiration date.⁶ Catching an error inside that first year saves you from paying for a new passport later.

Updating Your Name

A legal name change after marriage, divorce, or court order means the bio page no longer matches your legal identity. The process depends on when the passport was issued:

Within one year of issuance, submit Form DS-5504 by mail with your current passport and a certified name change document. There is no fee, and the replacement is valid for 10 years.
More than one year after issuance and renewing by mail, use Form DS-82 with a certified name change document. Standard renewal fees apply.
More than one year and applying in person, use Form DS-11 with a certified name change document. If the change was due to marriage and you already have ID in your new name, proof of the name change may not be required.⁶

Protecting the Page

Keep the passport in a rigid cover or sleeve to guard against bending and moisture. When you travel, store it in a hotel safe or a locked bag rather than loose in a daypack, and keep it out of back pockets where it can warp or get soaked.

Be careful with digital copies too. That one page contains your full name, date of birth, passport number, and photo, which is everything someone needs for identity fraud. If you have to send a copy to a travel agent or visa processor, use encrypted email or a secure file-sharing service rather than text or social media.

Before any international trip, make copies. The State Department recommends keeping a set separate from the originals, leaving a set with a trusted person at home, and taking photos of your travel documents on your phone.⁷ If your passport is lost or stolen abroad, those copies speed up the replacement process at the nearest U.S. embassy or consulate. Report the loss immediately to protect yourself from identity theft.⁸

1
U.S. Department of State. Information about the Next Generation U.S. Passport
2
U.S. Department of State. After You Get Your New Passport
3
ICAO. Doc 9303 Part 4 – Machine Readable Passports
4
Travel.State.Gov. Frequently Asked Questions about Passport Services
5
U.S. Department of State. Passport Fees
6
U.S. Department of State. Change or Correct a Passport
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U.S. Department of State. International Travel Checklist
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U.S. Department of State. Report Your Passport Lost or Stolen