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10 Common UK ETA Mistakes That Delay Your Application (and How to Avoid Them)

March 7, 2026
10 Common UK ETA Mistakes That Delay Your Application (and How to Avoid Them)

Why UK ETA Applications Get Delayed

Every year, thousands of UK ETA applications are delayed or rejected because of avoidable mistakes. A simple typo, an expired passport, or a missing detail can turn what should be a quick approval into days of frustration.

We have reviewed thousands of applications at TravelReady24 and identified the ten most common errors. Fix these before you submit, and your ETA should sail through.

1. Passport Name Does Not Match Exactly

Your ETA application must match the name on your passport character by character. If your passport says "Mohammed" but you type "Mohamed", the system may flag your application for manual review.

How to avoid it: Copy your name directly from the machine-readable zone (MRZ) at the bottom of your passport's photo page. Double-check middle names and any hyphens or apostrophes.

2. Using an Expired or Nearly Expired Passport

Your passport must be valid for at least six months beyond your planned UK arrival date. If it expires sooner, your ETA will be refused regardless of how perfect the rest of your application is.

How to avoid it: Check your passport expiry date before you start the application. If it expires within six months of your trip, renew it first.

3. Entering the Wrong Passport Number

Transposing digits or confusing the letter "O" with the number "0" in your passport number is surprisingly common. An incorrect passport number means your ETA will not be linked to your travel document, and you could be denied boarding.

How to avoid it: Read your passport number from the MRZ line rather than the printed text above. Verify each character carefully and have someone else check it for you.

4. Applying With the Wrong Nationality

If you hold dual citizenship, you must apply using the passport you intend to travel with. Applying with your second nationality and then presenting a different passport at the UK border will cause problems.

How to avoid it: Decide which passport you will use to enter the UK and submit your ETA application using that same passport's details.

5. Leaving Out Contact Details or Providing Old Ones

An outdated email address or phone number means you will miss important notifications about your ETA status. If the authorities need to contact you for additional information, they will use the details you provided in the application.

How to avoid it: Use an email address you check daily. Make sure your phone number includes the correct country code and is currently active.

6. Applying Too Late

Standard ETA processing takes up to 72 hours, but it can occasionally take longer during peak travel seasons or if additional checks are required. Submitting your application the night before your flight is a risky strategy.

How to avoid it: Apply at least one week before your departure date. If you are travelling during school holidays or summer, apply even earlier. If you do need a last-minute ETA, our express and rush options can help.

7. Not Saving Your Confirmation

After your ETA is approved, you should receive a confirmation email. Losing this email or not saving your ETA reference number makes it harder to check your status or resolve any issues at the border.

How to avoid it: Take a screenshot of your confirmation screen. Save the confirmation email in a dedicated travel folder. Note your ETA reference number separately.

8. Providing Inconsistent Travel Information

If your application states you are visiting for tourism but your supporting documents suggest a business purpose, this inconsistency could trigger a manual review. The same applies to your accommodation details and length of stay.

How to avoid it: Be honest and consistent across all fields. If your plans are not finalised, provide your best estimate and keep it aligned with any booking confirmations you hold.

9. Ignoring the Declaration Questions

The ETA application includes declaration questions about criminal history and other matters. Some applicants rush through these without reading them carefully, leading to incorrect answers that can have serious consequences.

How to avoid it: Read every declaration question slowly. Answer truthfully. If you are unsure about any question, seek advice before submitting. A wrong answer is harder to correct than a delayed application.

10. Applying on an Unreliable Connection

Submitting your application on a patchy Wi-Fi connection or during a mobile data dropout can cause your form to submit partially or not at all. You might think your application was sent when it was not.

How to avoid it: Use a stable internet connection. Wait for the confirmation screen before closing your browser. If you are unsure whether your application went through, check your email for a confirmation before resubmitting to avoid duplicate applications.

What to Do If Your Application Is Delayed

If your UK ETA is taking longer than expected, do not panic. Here are the steps to follow:

  1. Check your email (including spam) for any requests for additional information
  2. Verify your application status using your reference number
  3. Contact the processing team if you have not heard back within the expected timeframe
  4. Do not submit a duplicate application, as this can cause further delays

How TravelReady24 Helps You Avoid These Mistakes

Our application assistance service includes built-in validation checks that catch the most common errors before submission. We verify your passport details, flag inconsistencies, and ensure your application is complete. With TravelReady24, you can apply with confidence knowing that your ETA application is in good hands.

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