You can sign your U.S. passport in blue ink. The State Department instructs passport holders to sign in blue or black ink, and either color is equally valid at immigration checkpoints.1Travel.State.Gov. After You Get Your New Passport Some travelers prefer blue because it makes an original document easier to distinguish from a photocopy; others prefer black for sharper contrast. Use whichever you normally reach for on important paperwork.
Where and How to Sign
A new passport book is not valid for travel until you sign it. Federal regulations require the bearer’s signature before the book becomes a legally usable document.2eCFR. 22 CFR 51.4 – Validity of Passports The line labeled “Signature of Bearer” sits on the data page near your photo.
Use your normal everyday signature, the one you put on checks and legal documents. Consistency matters because border agents sometimes compare your passport signature against other identification. A ballpoint pen is a practical choice: the ink dries quickly on the coated passport page and is less likely to smudge. Leave the book open for a few seconds after signing so the ink sets before you close it.
If you hold a passport card rather than a book, you can skip signing entirely. The signature requirement applies only to books, so the card is valid without one.3eCFR. 22 CFR Part 51 – Passports
Ink Colors to Avoid
Stick to blue or black. Red, green, purple, and other colors fall outside the State Department’s instruction, and while the guidance doesn’t spell out consequences, border officials expect to see one of the two accepted colors. An unusual ink color invites scrutiny you don’t need.
What If You Sign Wrong or Damage the Page
A slightly wobbly letter is not a problem. A wrong name, wrong ink, or a torn page is more serious. Do not use correction fluid or try to erase marks on the passport.4U.S. Department of State. DS-5504 – Application for a U.S. Passport for Eligible Individuals White-out or heavy scratching can make the document look tampered with, which is worse than the underlying mistake.
For a genuinely botched signature, contact the State Department or a passport acceptance facility and ask whether the error is serious enough to require replacement. A passport that appears altered or defaced may be treated as damaged, which means applying for a new one on Form DS-11 as though it were a first-time application. Replacement runs $130 in application fees plus a $35 execution fee, and routine processing takes four to six weeks.5Travel.State.Gov. United States Passport Fees for Acceptance Facilities6Travel.State.Gov. Processing Times for U.S. Passports Sign carefully the first time.
Signing a Child’s Passport
Children under 16 don’t sign their own passports. A parent or legal guardian prints the child’s full name on the signature line, signs their own name next to it, and notes the relationship, such as “mother,” “father,” or “guardian.”1Travel.State.Gov. After You Get Your New Passport Teenagers aged 16 and 17 sign their own passports, though a parent still needs to attend the appointment or provide a signed statement acknowledging the application.7USAGov. Get a Passport for a Minor Under 18 The same blue-or-black ink rule applies.