Introduction: The Last Line of Defense
Receiving an email stating *"Your Duolingo English Test results could not be certified"* is a devastating experience, particularly when your university application deadlines are only days away. While it is easy to panic and pay for a new test immediately, you should consider that a significant percentage of AI-generated invalidations are reversed upon manual human appeal. However, you only have exactly **72 hours** from receiving your results to submit an official appeal. A vague, angry, or emotional appeal will be instantly rejected. To succeed, you must write a highly structured, objective, and evidence-based appeal letter. In this step-by-step guide, we share successful appeal templates and show you how to structure your case.
1. The Appeal Success Matrix
Different invalidation reasons have different success rates during manual human review:
| Invalidation Reason | Acoustic / Visual Trigger | Manual Review Success Rate | Key Argument to Deploy |
|---|---|---|---|
| Gaze / Eye Movement | Pupils drifted outside the 15-degree cone. | Moderate (approx. 45%) | Argue that gaze movements correlate directly with cognitive retrieval pauses. Prove you have no external materials. |
| External Voice Detected | Background voice matched vocal frequency range. | High (approx. 60%) | Request manual human audio review to prove the sound was non-communicative ambient noise. |
| Secure Browser Closure | Background app generated a popup or notification. | Low (approx. 15%) | Prove that the background process was an automated system update with no user interaction. |
2. Rules for Structuring Your Appeal Letter
To ensure your appeal is taken seriously by the senior proctoring review board, follow these three rules:
- Maintain a Professional Tone: Avoid emotional complaints or accusations of system bias. State the facts clearly, objectively, and politely.
- Provide Environmental Context: Describe your testing room setup (e.g., "I sat in an isolated, locked room facing a blank wall, with no external materials present").
- Reference the Video Log: Explicitly ask the proctoring team to conduct a manual second review of your video and audio logs to verify your physical compliance.
3. Successful Appeal Letter Template
Use this structure for your official appeal: *"Dear Duolingo English Test Support Team, I am writing to appeal the 'Not Certified' decision for my test taken on [Date]. The invalidation reason cited was [Reason]. I wish to respectfully request a manual human review of my session video, as my environment was completely secure and compliant..."* Expand on this template with specific details about your room and hardware setup.
4. Technical FAQ: Appeals Process
Q: How long does it take to receive an appeal decision?
A: The review board typically issues a final decision within 4 to 7 business days after submission. Check your registered email daily.
Q: Can I submit multiple appeals for the same test?
A: No. You are legally allowed only one appeal per test session. If your appeal is rejected, the decision is final, and you must purchase a new test.
Q: If my appeal is approved, do I get my score immediately?
A: Yes. Once approved, the "Not Certified" status is instantly updated, and your official certified score report is released to your dashboard.