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What to do if…
you realise you entered your passport number incorrectly on an entry form and departure is close

Short answer

Treat this as a “may block boarding” issue until proven otherwise. First, work out whether the wrong number is on your carrier’s passenger information (API/APIS) or on a destination travel authorisation (e.g., ESTA/eTA/ETA/eVisa)—because the fix is different.

Do not do these things

  • Do not assume a “small typo” will be ignored—some checks match your passport number exactly.
  • Do not keep re-submitting random forms without knowing which system you’re changing (carrier vs destination government).
  • Do not rely on airport staff to “override” destination entry requirements at the last minute.
  • Do not email or message passport photos to unverified contacts or third parties.
  • Do not cancel flights/hotels in panic until you’ve confirmed whether you can correct it quickly.

What to do now

  1. Find what you submitted and identify what it was.

    • Carrier form: inside your airline/train operator “Manage booking / Check-in” area (often called API/APIS/Passenger information).
    • Government permission: a separate destination application/approval (travel authorisation/visa/eVisa).

  2. If it’s carrier API/APIS, try to correct it immediately in the booking/check-in flow.

    • Some operators let you re-submit passenger information before departure (a new submission can replace the old one).
    • Re-check the saved details after you submit.

  3. If you can’t correct carrier API/APIS online, contact the carrier urgently and ask them to correct the passport number.

    • Use the operator’s official contact options and say: “My passport number was entered incorrectly in passenger information; please correct it on my passenger details.”
    • Have your booking reference and passport ready. If you booked via an agent, contact them too—but if time is tight, contact the operating carrier directly as well.

  4. If it’s a destination government travel authorisation, act quickly and use the official site to confirm what can be changed.

    • Many authorisation systems allow changes only to limited fields; passport details often require a new application.
    • Use the official “check status/update” function (if available) and don’t assume it’s fixed unless the system shows the correct passport number.

  5. If you rely on a UKVI digital status (eVisa) to travel, make sure the correct passport/travel document is linked.

    • If your passport/travel document details in your UKVI account are wrong or outdated, update them so your eVisa can be checked against the document you’re actually travelling on.

  6. Set yourself up for the terminal in case you still need a human fix.

    • Arrive earlier than you normally would.
    • Bring the physical passport you will travel on.
    • Keep booking references and any authorisation reference numbers accessible offline (download/save confirmations).

What can wait

  • You do not need to decide today whether to complain, seek refunds, or escalate.
  • You do not need to gather “proof” beyond saving any confirmation pages/emails.
  • You do not need to rebook anything until you know whether the correction/re-application worked.

Important reassurance

This is a very common last-minute mistake. In practice, it’s usually confined to one of two places: the carrier’s passenger info or the destination government’s permission to travel. Once you identify which one is wrong, the next action is usually clear.

Scope note

This guide covers first steps to reduce the risk of being refused boarding due to a passport-number mismatch. It does not cover complex visa cases, denied authorisations, or emergency passport replacement.

Important note

This is general information, not legal advice. Boarding and entry decisions depend on the destination’s rules and the carrier’s checks, and they can change. If you cannot verify the corrected passport number in the relevant official system, treat it as unresolved.

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