June 2, 2026Updated June 14, 202612 min read

Reasons for Uncertified Results in Duolingo English Test (DET)

Your DET score came back Uncertified. Here is every reason, what Duolingo's proctoring AI actually checks, and how to fix it before your next attempt.

What does Uncertified actually mean on the DET?

You paid $70. You sat for an hour. Then you saw the worst word. Uncertified. It means your result is not usable. The score exists, but no university will accept it. Let us explain what it means. Then we will look at your next options.

The Duolingo English Test has three end states for every attempt:

Certified is the one you want. It means Duolingo's AI and human reviewers both approved your session. Your score is ready to send.
Uncertified is what this article covers. It means the system saw a rule break. Your score is blocked.
Invalid is rare. It usually means the test crashed or your internet dropped. No score was produced.

Universities only see Certified results. An Uncertified attempt is invisible to admissions. That is the small good news.

But you pay $70 again. And you wait 48 hours more.

Three end states for every DET attempt

Certified means your score passes Duolingo's integrity review and goes live in your account. Uncertified means a rule was broken, the focus of this article. Invalid means no score was produced, usually from a crash or a connection drop. The table underneath maps them side by side.

Status	What it means	What you can do
Certified	Your score is live and valid for 2 years	Send to universities immediately
Uncertified	A rule was broken, score is blocked	Appeal within 72 hours, or buy another attempt
Invalid	Test data did not upload, no score	Retake within your credit window

6,000+Institutions accept DET, but only when the result is Certified

The full reason tree: every reason your DET can be Uncertified

Every Uncertified result comes from one of four root categories. Below is the full tree. The next sections go deep on each one. You will see the rule, an example, and the reason for every trigger.

Duolingo English Test Uncertified reasons mindmap. Four root categories cause DET uncertified results: identity and account issues, environment and room flags, behavior and proctoring AI triggers, and technical and network failures. — The four root categories and every sub-trigger we cover in this article.

Category 1: identity and account issues

Identity is the first check. If Duolingo cannot confirm who you are, the result stays locked. The system checks your ID at the start. It checks again during human review. Most flags come from a small mismatch. You could have fixed it in five minutes.

ID document problems.

A blurry photo stops the scan
An expired passport stops the scan
A torn corner or glare on the hologram stops the scan
You must show the original physical document. A photo on your phone, a scan, or a photocopy is rejected.

Name mismatch between ID and DET account.

Your account name must match your passport exactly
Middle names, accents, and married names can cause a flag
If your account says Maria Santos but your passport says Maria Juliana Santos-Pereira, the system blocks the result

Wrong ID type for your country.

Most students use a passport
In India, only a valid passport is accepted. Aadhaar, PAN, voter ID, and student cards are rejected
Check the official list at englishtest.duolingo.com/ids before test day

Multiple accounts or account sharing.

You can only use one DET account
A second account, shared login, or another person's name voids the result
It can also lead to a permanent ban

Over the attempt limit.

You get up to 3 attempts in any 30 days
Invalid and Uncertified attempts count toward this limit
Going over blocks new purchases

Your ID passes if it meets all 5 of these

It is a passport or government-issued photo ID accepted in your country
It is not expired and is in good physical condition
The photo, name, and document number are clear and unglared
The name on the ID matches your DET account exactly
You are holding the original physical document, not a photo or photocopy

Wrong account name

Maria Santos

Right account name

Maria Juliana Santos-Pereira (matches the name on her passport)

Update the passport first, then the account

If you changed your name recently, update your passport before you update your DET account. The account must match the document you present on test day, not the other way around. A name that does not exist on any government ID will be flagged.

What room and lighting issues can make your DET Uncertified?

The webcam sees your room for the full hour. If the camera sees it, the AI sees it. In 2026, the DET uses two cameras. Your laptop webcam shows one view.

A phone or tablet, set up as a secondary camera, shows the other. If either camera flags a problem, your result is at risk.

Face and lighting.

Your face must be clearly visible the whole time
No shadows, backlighting, or dim rooms
Glare on glasses counts as face obstruction
The system asks you to remove glasses at check-in

Other people in the room.

The room must be empty of other humans for the full hour
A child opening the door can trigger a flag
A partner checking on you can trigger a flag
Even a pet crossing the desk has triggered flags

Failed room or ear scan.

The 360-degree scan is not optional
Show all four walls, the door, behind the monitor, and the desk
The ear scan happens during setup
A rushed or incomplete scan gets your session rejected

Test-day room checklist

Desk is empty. No paper, pens, phones, or second monitor
No headphones or earbuds. Built-in speakers and mic only
Both ears visible during the setup scan
Door closed and visible to the webcam
Lighting bright on your face, no shadow or backlight
No one else in the room for the full hour
Secondary phone or tablet on a charger, in landscape, framed to show your screen, keyboard, and hands
Phone set to Do Not Disturb before you start

Do the 360-degree check yourself, 10 minutes early

Stand up. Walk slowly in a circle. Show the walls, the door, the ceiling fan, the bookshelf behind you, the area behind your monitor. Look at the desk from the camera angle. If you would not want an admissions officer to see it, remove it now. The same scan you do is what the proctor will see.

What desk and equipment issues can make your DET Uncertified?

Your desk is scanned on its own. The AI looks for anything that could be used to cheat. This includes items you never touch. The safest plan is to start with a completely empty desk. Then add only the testing computer.

Prohibited items in view.

The desk must be empty except for the testing computer
No paper, pens, notebooks, second monitor, smartwatch, books, or headphones
The only phone allowed is the secondary camera
A water bottle can be a problem. The AI may mistake it for a phone. Skip the drink.

Headphones, earbuds, earplugs.

All types are banned. This includes transparent, single-ear, and bone-conduction
Use the built-in laptop speakers and microphone only
The AI checks by asking you to show both ears at setup

Your desk passes the setup scan if it meets all 6 of these

Desk is empty except for the testing computer and a charger cable for the secondary phone
No paper, pens, notebooks, books, or second monitor within arm's reach
No smartwatch, jewelry, or accessories on the desk surface
No water bottles, drinks, or food that the AI could mistake for a phone
Built-in laptop speakers and microphone are the only audio path in use
No headphones, earbuds, earplugs, or bone-conduction devices of any kind

Avoid

Paper, pens, a second monitor, or a smartwatch sitting within arm's reach of the keyboard

Use instead

A completely empty desk with only the testing laptop and a charger cable for the secondary phone

Headphones are banned, even bone-conduction

No headphones, earbuds, or earplugs of any kind. Built-in laptop speakers and microphone are the only audio path allowed. The setup scan asks you to show both ears, and the AI verifies the audio source throughout the test.

Category 3: behavior and proctoring AI signals

The AI watches what you do. It does not just watch the room. This category catches students who did everything else right. But they gave the system a reason to doubt them. The exact flag wording is worth knowing. The AI is consistent about its patterns.

Gaze and head pose.

Gaze tracking is the most common behavior flag
Looking away from the screen for a long time triggers it
The flag message reads: 'You looked away from the screen for an extended period of time'
Glancing at the keyboard is fine
Glancing at your phone, the wall, or a person off-camera is not
Repeated head turns count the same

Speaking or mouthing during non-speaking tasks.

Reading aloud gets flagged
Mouthing words during Listening gets flagged
Whispering during Writing gets flagged
The flag message reads: 'During the speaking section, it was evident you were reading a response that had been written out'

Suspicious typing patterns.

Long pauses followed by fast bursts get flagged
Copy and paste gets flagged
Text that matches other submissions gets flagged
The AI checks your typing rhythm against normal human patterns

Browser focus and tab switching.

Alt-tab breaks the secure environment
Opening a new window breaks it too
A screen-recording tool can also break it
The system logs every focus loss

Face obstruction.

Covering your mouth counts as obstruction
Covering your ears counts too
Using hands or clothing also counts
The AI keeps watching after the setup scan ends

The 5 behavior triggers that flag your session

Gaze off-screen for an extended period (looking at your phone, the wall, or a person off-camera)
Mouthing or reading aloud during Reading, Listening, or Writing tasks
Copy-paste or text patterns that match other submissions (typing rhythm flagged as non-human)
Whispering or any off-screen voice picked up by the microphone
Face obstruction (covering your mouth, ears, or face with hands or clothing at any point)

Avoid

Wearing AirPods during the test to hear the Listening section more clearly

Use instead

Built-in laptop speakers at moderate volume, with the laptop mic open for Speaking

Weak

“Mouthing the words while reading each Reading passage, then speaking the Speaking prompts with a rehearsed tone”

Strong

“Silent face and still lips during Reading and Writing items, then natural pauses and rephrasing when thinking during Speaking”

The 3-second rule on Speaking items

If you stay silent for more than 3 seconds on a Speaking prompt, the system assumes you are done and moves you on. You lose the rest of the response time. Fill thinking pauses with transitional phrases like "and another point is" or "what this means in practice is". The microphone stays open. The score stays intact.

Duolingo English Test proctoring AI monitoring breakdown. A 2x2 grid showing the four signal streams the DET proctoring AI monitors during the test: webcam video, microphone audio, gaze tracking and head pose detection, and room and desk scanning. — Four signal streams the proctoring AI watches every second of your session.

Category 4: technical, browser, and network issues

Some Uncertified results are not your fault. The test crashes. The internet drops. The camera stops working. The system cannot certify what it never fully got. These flags are the hardest to argue in an appeal. Duolingo says you cannot appeal technical failures. You must retake.

Unsupported device or operating system.

You need a Windows or Mac laptop or desktop
Surface Pro in tablet mode is rejected
Chromebooks and Linux are rejected
Virtual machines are detected
Dual monitors must be disconnected
Run the system check in the DET app 48 hours before
Use the exact computer you will test on

Wrong browser.

The DET runs only in the current Google Chrome
Safari, Firefox, Edge, and Brave are all blocked
Outdated Chrome is also blocked
The DET desktop app is safer for writing

Network instability.

A VPN can flag you
Unstable Wi-Fi can flag you
ISP throttling or packet loss can flag you
A drop mid-test can flag you
Use wired ethernet when you can
A drop of a few seconds can end the session

Forbidden software.

Grammarly, Zoom, Skype, Discord, and Slack all trigger flags
WhatsApp, TeamViewer, and AnyDesk also trigger flags
Predictive text and auto-complete trigger flags
Non-Latin input methods like Pinyin trigger flags
The DET app does a full system scan. Close everything first.

Hardware failure mid-test.

Your OS can revoke camera permission
Another app can take over your microphone
Headphones on the Bluetooth list can still connect
Any of these can stop proctoring mid-session

Setup	Supported	Not supported
Computer	Windows 11+ laptop or desktop	Surface Pro, Chromebook, Linux, virtual machine
Operating system	Licensed Windows or Mac OS	Work laptops with admin firewalls, dual-boot
Browser	Current Google Chrome	Safari, Firefox, Edge, Brave, outdated Chrome
Network	Wired ethernet, stable Wi-Fi	VPN, mobile hotspot, public Wi-Fi
Audio	Built-in speakers and microphone	Headphones, earbuds, earplugs, headsets
Displays	Single monitor	Dual monitors, external displays
Background apps	None	Grammarly, Zoom, Discord, Slack, TeamViewer

48 hours before the test

Run the DET system check on the exact computer you will use
Restart the computer to clear stuck background processes
Uninstall or disable Grammarly, auto-complete, predictive text
Force quit Zoom, Slack, Discord, and any screen-recording tools
Disable your VPN and check the connection with a speed test
Charge the laptop to 100% and plug in the secondary phone
Clear the desk. Remove papers, pens, second monitor, smartwatch
Switch the phone to Do Not Disturb before you start

The review and appeal process

You clicked submit. What now? Every DET attempt goes through the same review steps:

The AI scans the video first
If nothing looks wrong, the result goes to Certified within 48 hours
If something looks off, a human reviewer watches the video
The outcome is either an override (Certified) or a confirmation (Uncertified)

The appeal window is 72 hours from the time you get the notice:

After 72 hours, the button is gone
You can only appeal if your account is blocked or the attempt used your test credit
Technical failures cannot be appealed. You must buy a new attempt.

The decision turnaround is 4 business days:

An appeals specialist watches your full session
They email you a final decision
You get one appeal per test
The decision is final. No second appeal. No escalation.

On the refund question:

Duolingo does not refund Uncertified results from rule breaks
Rule breaks include headphones, name mismatch, and background software
If the flag was a technical failure on Duolingo's end, they may give a free retake
The retake must happen in your original credit window

4 business daysAverage appeals specialist review window

An Uncertified result does not count against you permanently

Your test credit is consumed, but your account stays clean and the Uncertified attempt does not appear on your record. You can buy another attempt and try again today. Admissions offices only see the Certified scores you choose to send.

Duolingo English Test post-submit review process flowchart. After you submit the DET, the AI reviews your session. A clear path leads to a Certified result within 48 hours. A flagged path goes to human review, which returns either an Uncertified status or an override to Certified. — The full pipeline from your last answer to the final status in your account.

Quick-reference matrix: reason to trigger to fix

If you only have 30 seconds, scan this table. The full reasons are in the sections above. Each row shows the problem and the quick fix.

Category	Trigger	What the AI sees	Quick fix
Identity	Blurry or expired ID	Document unclear in photo	Use original, unexpired passport
Identity	Name mismatch	Passport name differs from account	Update account to match passport
Identity	Wrong ID type (India)	Aadhaar or PAN instead of passport	Use a valid passport
Identity	Photo of ID on phone	Screen reflection, not physical card	Show the original document
Identity	Multiple accounts	Same person, two emails	Use one account for life
Environment	Other person in room	Movement in background	Lock the door, tell your household
Environment	Paper or pen on desk	Forbidden note-taking tool	Clear the desk completely
Environment	Headphones on	Audio device blocks ear scan	Use built-in speakers and mic
Environment	Failed 360 room scan	Wall or door not shown clearly	Walk slowly, show all four walls
Environment	Secondary camera moves	Phone shifts mid-test	Use a heavy stand, never touch it
Behavior	Gaze off-screen	Sustained look away from monitor	Eyes on the screen at all times
Behavior	Mouthing words	Mouth movement during Reading	Read silently, lips still
Behavior	Rehearsed response	Detected as read from script	Use your own words, naturally
Behavior	Copy and paste	Paste detected in writing	Type every word, no shortcuts
Behavior	Whispering	Off-screen voice on mic	Silent unless Speaking task
Technical	Wrong browser	Safari or Edge used	Switch to current Chrome or DET app
Technical	VPN active	Location masked from system	Disable VPN, use real network
Technical	Grammarly running	Background process detected	Uninstall or disable before test
Technical	Camera disconnects	Mid-test video loss	Close other apps, revoke permissions
Technical	Premature shutdown	Test data not uploaded	Wait for the green confirmation screen

How Linguistic Academy helps you get a Certified DET score

You can spend 4 to 8 weeks on practice tests. You can try every prep course on the market. Some Uncertified results still happen. Why? The test day setup is the part no course covers. No course covers the room, the lighting, or the secondary camera. No course covers the browser or the 360 scan you only get one chance to do right.

If your deadline is close, you may not have weeks to wait. If the last attempt failed for a technical or room reason, the next one will fail too. The room and the equipment have to change. They have to change before you test again.

Linguistic Academy takes a different path. A trained professional works with you during your real test session. We handle the equipment. We handle the technical setup. We prepare your system, place the secondary camera, and run the room scan with you. On test day, we are with you for the full hour. The room, the rules, and the proctoring AI never become your problem.

We have done this over 1,000 times. We work across 30 countries. The success rate is 99.9 percent. If you need your target score by your deadline, this is the fastest path to a Certified result.

99.9%Success rate across 1,000+ DET cases

Your target score, guaranteed

We guarantee your target score. If you do not get the result you need, we work with you until you do. No extra cost. No fine print.

How the exam help process works

Tell us your details

Your target score, timeline, and background. That is all we need to get started.

We assess your case

We review your situation and confirm if we can take it on. Most cases are approved within 24 hours.

Technical setup

We guide you on the equipment you need and handle all the technical preparation so nothing goes wrong on the day.

Exam day support

We prepare your system, walk you through the entire process, and support you during the real test.

Score delivered

Your certified score gets sent directly to your university. No extra steps, no delays.

Frequently asked questions

What does Uncertified mean on the Duolingo English Test?

Uncertified is a status on your Duolingo English Test result. It means the system's proctoring AI or a human reviewer flagged a rule violation during your test, and your score is blocked from being released. Universities only see Certified results, so an Uncertified attempt is invisible to admissions. You can appeal within 72 hours or buy a new attempt.

Can I get a refund for an Uncertified DET result?

No. Duolingo does not refund Uncertified results caused by rule violations. If the system flagged you for headphones, a name mismatch, or forbidden software, you pay for a new attempt. If the flag was a genuine technical failure on Duolingo's end, you may be granted a free retake within your original credit window.

How many times can I retake the DET after an Uncertified result?

You can purchase up to 3 test attempts in any 30-day period. An invalid or Uncertified attempt still counts against this limit. Each retake costs **$70** (less with discount vouchers). There is no lifetime cap, and Uncertified attempts do not appear on your official record.

Does an Uncertified result appear on my score report?

No. An Uncertified attempt is recorded in your DET account history but is not visible to any third party unless you share it yourself. Universities only see the Certified scores you choose to send.

Can I appeal an Uncertified result?

Yes, but only if your account is blocked or the Uncertified result immediately consumed your test credit. You have 72 hours from the notice to submit the appeal through your account. Technical failures are not eligible. An appeals specialist reviews your session and emails a final decision within 4 business days. You get one appeal per test, and the decision is final.

Will the same setup fail me again?

Only if the original trigger was environmental, like the room, the desk, the lighting, or the ID. If the flag was behavioral (gaze, mouth movement, suspicious typing), it usually repeats across attempts because it is a habit. If the flag was technical (browser, network, device), fix the underlying issue before retaking. Use the quick-reference matrix in section 8 to match your last result to a fix.

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