Signed PDF certificate
Affidavit summarising the session, signature, and timestamp.
How to · WhatsApp & messaging
How to certify WhatsApp messages as legal evidence
To certify a WhatsApp conversation as legal evidence, use a browser session recording that captures the conversation in real time with a qualified RFC 3161 timestamp. This produces a certified video and signed PDF that is far harder to dispute than a screenshot.
VideoReal-time recording
HARNetwork log
RFC 3161Qualified timestamp
Why a WhatsApp screenshot is not enough.
WhatsApp screenshots are the easiest to fabricate of any digital evidence. Courts know this.
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Free tools generate convincing fakesA WhatsApp screenshot can be created in seconds by anyone.
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No metadata proves sender or timeThe phone number and timestamp are part of the image, not provenance.
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Messages can be deleted by the sender"This message was deleted" leaves no record of what was said.
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The other party will dispute itWithout a video and signature, denial is easy.
What a certified WhatsApp capture includes.
Browser session video
Real-time recording of the WhatsApp Web conversation as it was viewed.
network.har
Every network request WhatsApp Web made during the session.
RFC 3161 timestamp
Qualified independent signature on the captured session.
SHA-256 hashes
Cryptographic fingerprints of the video, HAR, and PDF.
Metadata ZIP
Manifest, signature, public key for independent verification.
How to certify a WhatsApp conversation in five steps.
1
Go to /certificates/new and select Browser SessionThe controlled browser opens on our infrastructure.
2
Open WhatsApp Web inside the sessionNavigate to web.whatsapp.com and scan the QR code with your phone.
3
Open the relevant conversationClick the chat. Scroll slowly to capture the full thread, sender names, and timestamps.
4
Click "Finish session and certify"The platform stops recording and bundles the artifacts.
5
Download the packageVideo, HAR, timestamp, PDF — share with your lawyer or the court.
Common use cases for certified WhatsApp evidence.
Divorce evidence →Preserve threatening or revealing messages from a spouse.
Neighbour disputes →Certify messages in community WhatsApp groups.
Workplace harassment →Capture WhatsApp messages from managers or colleagues.
Inheritance disputes →Document messages from the deceased before access is lost.
WhatsApp-certification questions.
How do I make WhatsApp messages admissible as evidence in court?
To certify a WhatsApp conversation as legal evidence, use a browser session recording that captures the conversation in real time with a qualified RFC 3161 timestamp. This produces a certified video and signed PDF that is far harder to dispute than a screenshot.
Are WhatsApp screenshots accepted as evidence in family court?
Screenshots may be submitted but are routinely challenged because they are easy to fabricate. A Browser Session recording of WhatsApp Web with the timestamped video and HAR is much harder to dispute and is the recommended evidence format.
What if I do not have access to a computer to use WhatsApp Web?
instantproof.legal opens a controlled browser on our infrastructure — you do not need a local computer. Open the platform from any device, log in to WhatsApp Web inside the controlled browser, and the session is recorded for you.
Can I also certify iMessage or Telegram conversations?
Telegram has a web app (web.telegram.org) and can be certified the same way. iMessage has no web client, so capture using a Browser Session that loads a Mac running Messages, or use a File certificate of an exported chat backup.
Is this legal advice?
No. This service creates technical evidence artifacts. Legal admissibility depends on jurisdiction and circumstances. Consult qualified legal counsel for advice specific to your situation.
Ready to certify?
Open a Browser Session. The other party cannot delete what is already in your signed video.