By Linguistic AcademyJune 2, 2026Updated October 4, 202612 min read

Reasons for Uncertified Results in Duolingo English Test (DET)

DET result not certified? Match the notice to ID, setup, rule or technical issues. Check remaining credit, retake options and appeal eligibility.

What does Uncertified actually mean on the DET?

A result that is not certified cannot be sent as a valid DET score. Read the reason in your account and email notice before deciding what to do.

Invalid is not limited to technical failures: official policy also uses it for rule violations and misconduct. An ID problem can require resubmission rather than a full retake.

A new payment is not always necessary. A credit permits up to three starts, and some technical or rule issues allow another start at no extra cost if attempts remain. Official credit policy

Use the DET exam guide to prepare for your next attempt.

Read the reason, not just the status

A result can be invalid because of technical problems, rule violations or misconduct. ID problems may need a new ID submission.

Notice	Meaning	Next step
Certified	Result can be shared	Check recipient requirements
ID problem	Identity needs confirmation	Resubmit accepted ID as directed
Technical issue	Result could not be certified	Retest free if credit attempts remain; no appeal
Rule violation or misconduct	Integrity requirements not met	Follow credit and account restrictions; appeal only if eligible

Up to 3 startsper purchased credit

Uncertified with a deadline close?

Tell us your target score and deadline. We confirm your case within 24 hours and support you through the real exam.

Check Eligibility See Results

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

These categories help organise the possible causes. They are not an exhaustive list or a frequency ranking. Your official notice determines the next step.

Category	Check
Identity	Accepted original ID and matching account details
Room and equipment	Required cameras, privacy and clear setup
Rules	Own responses, no prohibited aids or other people
Technical	App, permissions, network and upload

Category 1: identity and account issues

Identity problems may require resubmitting a valid ID rather than repeating the test. Official credit policy

Use an original, unexpired ID accepted for your country.
Make sure the details and image are clear.
Enter account details accurately and follow any correction instructions.
Use your own account; do not share it or create another account to evade restrictions.

Check the accepted-ID list before testing. Purchase limits are separate from identity checks: you may buy three tests per rolling 30 days.

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)

Follow the ID instructions

Use the accepted document for your country. If Duolingo requests a new ID submission, follow that request before booking another test.

What room and lighting issues can make your DET Uncertified?

Use a private, quiet, well-lit room and follow the app’s camera and scan instructions. Official test rules

Your face must remain visible. Avoid glare and strong backlighting.
Remove glasses for the ear scan as instructed. Smart glasses are prohibited; ordinary glasses do not require a blanket ban during the whole test.
No other person may be in the room.
Position the secondary camera to show the required view of the computer and your hands.
Complete the room and ear checks without rushing.

Do not assume a specific object or pet automatically triggers an invalid result; prepare the room according to the published rules.

Test-day room checklist

Remove prohibited materials and extra devices; retain the required secondary camera
Use the required microphone and speakers; no headphones
Complete the ear check as directed
Test in a private room without interruptions
Make your face clearly visible
Keep other people out throughout the session
Position and power the secondary camera as setup directs
Prevent phone notifications from interrupting the camera

Check the camera views before starting

Make sure both views meet the app’s instructions. Complete each required scan.

What desk and equipment issues can make your DET Uncertified?

Clear your desk of prohibited materials and devices. The required secondary camera is an exception to the general restriction on extra devices. Official test rules

Remove notes, paper, pens, books and extra screens.
Do not use headphones, earbuds or earplugs.
Use working microphone and speakers permitted by the current equipment instructions.
Check the official guidance for any item you are unsure about.

There is no verified rule that the AI mistakes every water bottle for a phone.

Desk and audio checks

No notes, paper, books or extra screens
Required computer and secondary camera arranged as directed
No headphones, earbuds or earplugs
Working microphone and speakers
Remove unnecessary devices
Complete the app’s equipment checks

Remove

Notes, extra displays or headphones

Keep

Required testing equipment only, arranged as setup directs

Check audio before starting

Follow current equipment guidance and test audio in the app. Do not use headphones.

Category 3: behavior and proctoring AI signals

Duolingo uses technology and human review to check test integrity. Published rules explain prohibited behaviour; they do not disclose a reliable second-by-second flag formula. Official test rules

Keep attention on the test; keyboard glances needed for typing are different from reading off-screen notes.
Speak only when instructed. Do not read or memorise outside answers.
Type your own responses without copying or external assistance.
Do not switch to other apps, use prohibited software or communicate with others.
Keep your face visible.

Natural pauses or fast typing alone do not establish misconduct. No official DET-wide three-second silence cutoff was verified.

Follow the published rules

Focus on the test
Speak only when instructed
Use your own words
No notes or prohibited assistance
Keep your face visible

Avoid

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

Use instead

Permitted speakers and microphone, checked in the app

Weak

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

Strong

“Read silently when instructed and give your own spoken answers with natural pauses”

Use the displayed response timer

Follow the instructions for each task. Do not rely on an unverified three-second silence rule.

Rules and detection are different

The rules are public. Exact flag thresholds and the sequence of automated and human checks are not a preparation formula.

Category 4: technical, browser, and network issues

A crash, lost connection or failed camera can prevent certification. Technical issues are not appealable, but a free retake may be available if starts remain on your credit. Official credit policy

Install the current DET desktop app on a compatible Windows or Mac computer. A browser alone is not the testing environment.
Check camera, microphone and recording permissions on that same computer.
Use one display and close other apps. Do not use VPNs, virtual machines or assistive software.
Test a stable connection and keep equipment powered.
Follow current requirements rather than a fixed browser or operating-system table from an older guide.

Official preparation guide

Item	What to check
Computer	Current supported Windows or Mac requirements
Test software	Install the current DET desktop app
Network	Stable connection; no VPN
Audio/video	Permissions and equipment checks pass
Display	Single display; disconnect extras
Other apps	Close applications and prohibited tools

48 hours before the test

Run equipment checks on the computer you will use
Install the current DET app
Close other apps and prohibited tools
Check camera and microphone permissions
Disable VPN and confirm a stable connection
Power the computer and required secondary camera
Remove notes, extra devices and screens
Prevent notification interruptions

The review and appeal process

Follow the reason in your result notice. Duolingo uses automated checks and human review. Do not assume that only flagged sessions receive human review.

Appeals

Eligible cases include an email saying your account is blocked or an invalid result that immediately consumes your credit.
The account must show Appeal This Result. Submit within 72 hours of the notice.
Technical issues are not appealable.
The specialist normally sends a final decision within four business days. One appeal is allowed per invalid result.

Official appeal rules

Retakes

Technical problems and some rule violations permit free retesting if attempts remain.
ID issues may require resubmission only.
Two rule violations on one credit expire it; those cases are not appealable.
Suspension or permanent blocking can prevent retesting.

Official credit policy

For the filing steps, read the appeal guide. If your deadline cannot survive another solo attempt, we prepare the setup with you and support you through the retake.

4 business daysreview time

Check the credit and account restrictions

A non-certified result does not always consume a credit. It can also lead to restrictions. Follow the official notice.

Result issue	Next step
Technical	Check remaining starts; no appeal
ID	Resubmit ID as directed
Rule violation	Check credit and account status
Eligible misconduct/blocked notice	Appeal within 72 hours if button is available

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.

Notice category	Check	Next step
ID	Document accepted and details accurate	Resubmit ID if requested
Room/equipment	Required camera views and privacy	Fix setup before retesting
Rules	Published requirements and notice	Follow credit/account restrictions
Technical	App, permissions, network	Retest on remaining credit if available
Appeal-eligible	Button available and within 72 hours	Submit one factual appeal

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.

If you need a Certified score on a short timeline, read cheat in Duolingo English Test for how test-day support works.

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

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?

It means there is no certified score you can share. The notice may describe technical issues, ID problems, rule violations or misconduct. Invalid is not limited to technical failures. Read the notice and check your credit. Official credit policy

Can I get a refund for an Uncertified DET result?

Do not assume you must buy another test. Technical problems and some rule violations allow a free retake if starts remain. ID problems can require only resubmission. Refund eligibility is a separate question; check the current policy and your notice. Official credit policy

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

You may purchase three tests per rolling 30 days. A credit allows up to three starts and one certified result. Free retakes depend on remaining starts and the result notice; suspensions or blocks can prevent testing. Official credit policy

Does an Uncertified result appear on my score report?

Only certified results can be shared as valid scores. The non-certified attempt remains in your account history; it is not a certified score report.

Can I appeal an Uncertified result?

Only certain invalid results are eligible. Look for Appeal This Result in your account and submit within 72 hours. Technical failures are not eligible. A final decision is sent within four business days. Official appeal rules

Will the same setup fail me again?

Fix the issue named in your notice before retesting. Repeating the same setup does not guarantee another invalid result, but leaving an identified problem unresolved adds risk.

2026-10-02