Understanding Amazon Prime Video Risk Warning Emails and How StreamFab Security Upgrades

As an Amazon Prime Video user, you may have come across or received a risk warning email regarding alleged violations of Prime Video’s Terms of Use.

Since Amazon’s recent upgrade to its security mechanisms, traffic not aligned with these updates may be flagged, resulting in warning emails and misclassified by Amazon’s systems. We’ve since released updates to stay aligned.

Our team has taken this matter very seriously and responded rapidly with technical upgrades.

The latest version is designed to align with Amazon’s updated mechanisms and completely eliminate the likelihood of false flags., and you can use our software with confidence.

Below you’ll find the event background, core technical details, important user behavior notes, and StreamFab’s official response.

1. Background: Why You May Have Received a Warning Email

Amazon Prime Video continues to enhance its content protection and risk detection systems, upgrading API interfaces and playback session management. When Amazon detects activities that do not comply with its Terms of Use—such as unauthorized downloads, bulk content scraping, or frequent refunds—it will issue a risk warning email to the account in question.

The most common cause of these emails during this period has been Amazon’s back-end identifying non-compliant download behaviors—including requests not aligned with the new session and those not compatible with the new APIs—as “abnormal” activity.

2. Common Risky Usage Behaviors (Important Update)

To help users stay compliant to watch Amazon Prime Video offline and avoid being flagged as high-risk by Amazon, please take note of the following behaviors that may trigger warnings:

Using a VPN to Access Content

Many users use a VPN to access geographically restricted Prime Video content.
Note: Amazon strictly monitors VPN behaviors. If your VPN server is outside the authorized region, playback may simply be restricted for that content. Using a VPN, in itself, does not trigger risk emails or account penalties, though it may prevent content viewing in unauthorized regions.

Violating Transaction/Payment Rules

Some Prime Video content must be purchased or rented individually. If users frequently refund or revoke payment after watching or downloading, Amazon may mark this as "untrustworthy transaction" behavior
Impact: Abuse of this can reduce your account reputation and, in severe cases, lead to warnings or account limitations.
Advice: Only request refunds or cancellations when absolutely necessary; act responsibly after viewing or downloading content.

Account Sharing & Simultaneous Device Usage

Amazon currently allows up to three devices to stream different content at once; for the same title, up to two devices may stream concurrently.
Note: As long as you remain within these limits, household sharing is permitted. Overuse, such as exceeding device limits or switching excessively between devices, may trigger playback restrictions, but does not lead to widespread bans as seen with some other platforms.

Download Tools and Content Decryption Practices

Tools utilizing untrusted or leaked certificates (e.g., public Playready/Widevine certificates) to obtain content are more likely to be flagged by the platform and may result in account penalties.
StreamFab Note: StreamFab always uses trusted Chrome Widevine methods for decryption and never uses blacklisted certificates, ensuring technical compliance and safety. Our latest builds avoid untrusted components and are engineered to align with platform session and playback requirements.

API Compatibility Issues in Download Tools

With Amazon’s complex new Session+Playback API system, older versions of StreamFab that were not properly upgraded might have failed to failed to establish the required playback session state under Amazon’s updated rules. This could cause Amazon to classify download requests as abnormal, leading to warning emails.
Key Reminder: By using the latest version of StreamFab (v6.2.4.7 or above), which fully adopts the new Session and API mechanisms, you can avoid these risks entirely to download Amazon Prime Video titles safely.

3. Amazon API Changes & Technical Insights (with Playback API Details)

API Upgrade Background & Key Points

• Amazon Prime Video has recently upgraded its API interfaces and playback validation processes.
• Session Mechanism Introduction: Amazon now mandates that all viewing activities report to their platform in real-time by registering playback tokens, simulating a genuine user session.
  • StartSession: When playback begins, the client notifies Amazon (“I want to start watching”) and receives a playback token.
  • UpdateSession: During active playback or pause, the client continuously notifies Amazon (“I’m still watching” or “I have paused for now”).
  • StopSession: Once playback ends, Amazon is notified (“I have stopped watching”).
• Playback API Upgrade: To obtain required download info (video/audio/subtitles), download tools must interact with the Playback API:
  • Previously, the legacy API allowed tools to extract needed streams without starting genuine playback—enabling downloads without a bound playback session sent to Amazon’s server.
  • With the upgrade, Amazon made access more complex, requiring download tools to have a valid session before access.. Legacy APIs are not immediately deprecated, but failing to use the correct process may be flagged as unauthorized access.
• License & Decryption Key Handling: Licensing is required for decrypting video/audio streams. With the new update, the process is more complex and secure. StreamFab’s Amazon Downloader continues to use trusted Widevine CDM methods for decryption—never untrusted public certificates—maintaining high security and full compliance.
• StreamFab’s Response: Recognizing these changes, StreamFab updated to use Amazon’s latest APIs in all recent versions (v6.2.4.7+), establishing compliant session flows consistent with Amazon’s updates and behavior, thereby avoiding compatibility and risk issues.

4. Is It Still Safe to Use StreamFab with My Amazon Account?

Yes! Your Amazon account is safe with the latest StreamFab version.

Extensive Testing & Feedback:

• Legacy Account Testing: We have used long-standing Amazon accounts—also involved with MusicFab and BookFab—for ongoing and automated testing. These accounts have never received a risk email, even during major API changes.
• New Account Testing: We registered new Amazon accounts specifically for API upgrade validation. Using StreamFab v6.2.4.7 and newer, we conducted controlled tests across multiple regions and scenarios, all tests (frequent, high-volume downloads) resulted in zero risk warnings or restrictions from Amazon.
• Comprehensive & High-Pressure Scenarios: Our tests covered:
  • Regions: Amazon US/DE/UK/JP, Prime Video AU/CA/HK/TW, etc.
  • Formats: Diverse mixes (H264/H265, CVBR/CBR, EAC3/AAC).
  • Networks: VPN scenarios (NordVPN, ExpressVPN).
  • Volume: 50–150 downloads per account, per day—far above the typical user.
• User Feedback & Monitoring: Since the latest release, all user feedback and our telemetry have shown zero instances of users receiving new risk emails when using only up-to-date StreamFab. No abnormal issues were detected, even under heavy-use conditions.

Conclusion

We will continue to monitor Amazon’s security policies and API updates.

As long as you use the latest version of StreamFab for personal and compliant purposes, your Amazon account is safe.

If questions or issues arise, we welcome your feedback.

5. StreamFab’s Protection and Commitment

• Rapid Updates & Global Verification: All regions and accounts, both legacy and new, have been extensively tested—zero new risk emails.
• Compliance-First Usage: Use StreamFab only for your own personal purposes; never distribute downloaded content for commercial or illegal purposes.
• Continuous Iteration: We will track Amazon’s evolving APIs and risk policies to keep StreamFab at the frontline of technical safety.

6. Conclusion

The StreamFab team always puts user safety first. As long as you keep StreamFab up to its latest version, you can download Amazon Prime Video content safely and in full compliance with no account risk.

Thank you for your support and trust. Please continue to share your feedback with us, we are here to safeguard your entertainment experience!

Last but not the least, please use StreamFab only for personal, lawful purposes and respect platform terms. This communication is for informational purposes and does not constitute legal advice.

StreamFab Product Team
August 2025