How Certidox works

Certify documents and outgoing emails

Create a verifiable reference before sharing information.

• Documents: certify a document manually or through an existing business application.
• Emails: certify outgoing messages automatically through the Certidox Mail Proxy Server.
• Daily work: employees can keep using familiar email tools, including Microsoft 365 and Google Workspace.

Certidox records the certifying party, exact certified content and certification date. The certification QR code provides access to that record.

A fixed certified reference. No change to your usual email workflow.

Share documents and emails

Send, print, copy or forward information as you normally would.

Certidox works with digital and printed documents, originals and copies. As long as the QR code remains readable, a recipient can access the certified reference.

The QR code opens verification. It is not proof by itself.

Instantly verify the document you received

Look beyond the logo, signature or familiar email address.

A recipient can examine who certified the information, what was certified, when it was recorded, and whether the certification is still valid. The recipient must also compare the certified reference with the document or message received.

Step 1 of 3

Scan the QR code

Scan this QR code with the Certidox app to verify the document.

Don't have Certidox yet? Download the app for free before scanning. Available on the App Store or Google Play.

Original certified document Page 1 of 2Page 2 of 2

To scan a printed copy or inspect both pages:

Download the original PDF

On a smartphone or a tablet?

If the QR code is displayed on the same device, follow the steps below to open it with the Certidox app.

These screens illustrate the gestures only. For a real verification, use the QR code in the original certified PDF above, not the QR code pictured in the screenshots.

Apple

On an iPhone or iPad, touch and hold the QR code, tap Share..., then select the Certidox app.

Illustrative Apple interface based on the Certidox sample document. Menus can differ by device and app.

Android

On an Android phone or tablet, touch and hold the QR code, tap Share if needed, then select the Certidox app.

Illustrative Android interface based on the Certidox sample document, not tested on an Android device. Menus can differ by device, browser and Android version.

Step 2 of 3

Check the verification result

Check the certifier, certification date and status displayed in the Certidox app.

Enlarge the original screen

Step 3 of 3

Compare the certified reference

Tap View document and compare the certified reference with both pages of the PDF you received.

Enlarge the original screen

Always verify the live status and compare the content before relying on a document.

Keep control of your document after sending it

The certified content remains unchanged after distribution, but its certification status remains under the issuer’s control. An authorized certifier can revoke or supersede a certification when needed, even if copies of the document are already in circulation.

• Recipients can check the document’s current certification status whenever they scan its Certidox QR code.
• Anyone who previously verified the document and subscribed to its alerts can receive a real-time notification if the certification status changes.
• Revoking a certified email does not recall or delete the delivered message.

This capability is explained separately from the valid demonstration PDF above. No revoked screenshot is presented as belonging to that document.

Check the evidence independently

In the event of a dispute, independently examine the historical evidence of what was certified and when.

Certidox provides an Independent Verification Bundle that allows technical reviewers to examine historical certification evidence with independent cryptographic tools.

Download the certified PDF and the accompanying evidence package. A technical reviewer can use them to check independently that the certified file corresponds to the recorded evidence. The bundle contains historical proof; it does not replace a live status check.

Download the actual files:

The evidence ZIP includes the key needed to reconstruct the certified content. Treat it as sensitive whenever you use it with confidential documents.

Related context: ABA Resolutions 503 and 604 and independent verification. Certidox is not an apostille service, and these resolutions are not an ABA endorsement of Certidox.

Confidential by design

Your confidential documents and emails are encrypted before they reach Certidox servers.

• Documents are encrypted on the certifier's computer.
• Outgoing emails are encrypted by the Certidox Mail Proxy Server within the organization.
• Certidox servers store neither readable certified content nor decryption keys.

Encryption and verification diagram

Frequently asked questions