How to certify a file with legal value
The ways to certify a file
A certified file gets a certain date and its content is fixed from the moment you certify it. It does not prove how or when the file was created.
- Method 1Recommended
From your phone
Import a document, a photo or any other file from your phone, or share it from another app.
App for iOS and AndroidCertify from your phone - Method 2
On your computer
Upload one or more files from the browser, without installing anything.
PortalUse the Portal - Method 3
From your software
For files that come from one of your systems. Certifies the file or its fingerprint.
API and MCPIntegrate the API
How do you certify a file from your phone?
In the app you import the file from the phone and confirm. Content and certain date are fixed from that moment.
How to certify a file on your phoneVideo tutorial · 1:38
How to certify a file on your phoneVideo tutorial · 1:38
How to certify a file on your phoneVideo tutorial · 1:38
How to certify a file on your phoneVideo tutorial · 1:38
How to certify a file on your phoneVideo tutorial · 1:38
How to certify a file on your phoneVideo tutorial · 1:38- 1
Download the app
Free to download on the App Store and Google Play. Requires iOS 18.2 or Android 8.0 or later.
- 2
Open File
Log in or sign up, then tap “File” under “Certify now”.
- 3
Import the file
Tap “Import file”, then “Import from File” for a document or “Import from Camera Roll” for a photo or a video.
- 4
Confirm and send
Check the preview and tap “Confirm and send”.
TrueScreenHow do you certify a file from your computer?
From the Portal you upload one or more files in the browser. The fingerprint of each file is calculated in your browser before certifying.
From the Portal, step by step
Sign in to the Portal. Under “Fast certifications” click “File”, drag the files into the window and click “Confirm”.
You get a ZIP with the certification and a copy of the files.
How to certify a file on your computerVideo tutorial · 1:04
How to certify a file on your computerVideo tutorial · 1:04
How to certify a file on your computerVideo tutorial · 1:04
How to certify a file on your computerVideo tutorial · 1:04
How to certify a file on your computerVideo tutorial · 1:04
How to certify a file on your computerVideo tutorial · 1:04How do you certify files from your own software?
With the API or MCP, your system sends the file, or just its fingerprint, and receives the certification.
- Your softwareManagement system, app or archive
- TrueScreen API or MCPReceive the file or its SHA-256 fingerprint
- Your certificationWith a qualified electronic seal and timestamp
What a certified file contains
PDF report
The file name, its fingerprint and the certain date.
Electronic seal and timestamp
Qualified under the European eIDAS regulation.
SHA-256 fingerprint
If the file changes by even one byte, it shows.
Original file
A copy of the file, exactly as you uploaded it.
JSON data
The same data, readable by software.
Public verification
Anyone can check it on the TrueScreen verification page, without uploading anything.
What legal value does a certified file have?
A file certified with TrueScreen carries full legal and evidentiary value, worldwide.
Certain date
The content of the file is fixed with a qualified timestamp from the moment of certification.
Qualified electronic seal and timestamp
They fix the content and the date under the European eIDAS regulation.
Verifiable integrity
Any change to the file or the report, however small, is detected.
Questions about certified files
What does certifying a file prove?
That the file existed, unchanged, from the moment you certify it. It does not prove how or when the file was created: for that, capture the content in real time with TrueScreen.
Which files can I certify?
Documents, PDFs, spreadsheets, photos, videos, audio files and archives: the app and the Portal import any type of file.
Can I certify a file without uploading it?
Yes, by certifying only its SHA-256 fingerprint, with the Forensic Browser on your computer or with the API. Keep the original file: you need it to verify the certification later.
Can I share a file from another app?
Yes. Share it to TrueScreen from another app and it opens in the file import. On iPhone and iPad you can share up to 10 items at a time.
Can I certify an email attachment?
Yes. Send the email from an enabled sender to the TrueScreen address of your workspace: the message and its attachments are certified, each with its own fingerprint.
How much does it cost?
The cost depends on the type of capture and is shown before you confirm. When you sign up you get 2 free credits.
How can the recipient verify the file?
With the ZIP package and the TrueScreen verification page: the check runs in the browser and nothing is uploaded.
Certify your first file
Sign up and get 2 free credits.
