The most common mistakes when filling out a UK ETA application — and how to avoid them

Applying for a UK ETA is a relatively simple process, but small mistakes can lead to delays, rejections, or even problems at the border. To help you avoid unnecessary stress, we've put together a list of the most common errors applicants make — and how to steer clear of them.

1. Incorrect Passport Number

One of the most frequent mistakes is entering the wrong passport number — either due to a typo or confusing numbers with letters (e.g. “O” vs “0”).

✅ How to avoid it:

Double-check your passport number exactly as it appears in your machine-readable zone (the two lines at the bottom of the photo page). Enter it carefully and slowly.

2. Mismatched Travel Dates

Providing inaccurate or unrealistic travel dates can raise red flags and delay processing.

✅ How to avoid it:

Make sure the arrival date you enter matches your actual travel plans. If your travel is flexible, use the earliest possible arrival date to be safe.

3. Missing Middle Name

Leaving out your middle name (if it appears on your passport) or entering your name in the wrong order can cause issues at immigration.

✅ How to avoid it:

Enter your full legal name exactly as it appears on your passport, including all middle names.

4. Invalid or Mistyped Email Address

Since your approved ETA is sent by email, using a wrong or mistyped email address means you might never receive it.

✅ How to avoid it:

Double-check your email for typos before submitting the form. Make sure you can access that inbox easily.

5. Using an Expired Passport

Applying with an expired or soon-to-expire passport will lead to automatic rejection.

✅ How to avoid it:

Ensure your passport is valid for the entire duration of your stay in the UK. Ideally, it should be valid for at least 6 more months.

7. Submitting Incomplete Applications

Missing a required field or skipping a section may lead to rejection or longer processing time.

✅ How to avoid it:

Take your time. Review each section before hitting “Submit.” If you're unsure, use a service that offers human review of your application.

Final Tip: Let Experts Help You

If you're unsure about any part of the ETA application, don't risk delays or rejections. At GetETAUK, we check and handle everything for you — making sure your application is accurate, complete, and submitted the right way.

Start your ETA application now and travel stress-free.