Signed PDF certificate
Tribunal-ready affidavit summarising what was captured.
Use case · Workplace & employment disputes
Preserve digital evidence for workplace disputes and tribunals
Before filing a grievance, before HR locks down channels, before colleagues delete messages — capture the evidence. A certified record of Slack messages, emails, or rota changes is essential to a credible employment tribunal claim.
RFC 3161Qualified timestamp
Ed25519Signed manifest
PDF + ZIPTribunal-ready package
Why a screenshot is not enough.
Workplace evidence disappears quickly once a complaint is filed. Screenshots alone are easy for the employer to challenge.
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HR can delete channel historyAdmins can erase Slack, Teams, or Workplace messages — including your screenshots' source.
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Colleagues delete sent messagesOnce the dispute is public, evidence vanishes within hours.
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Phone screenshots crop critical contextSender, channel, time, and reactions are usually missing.
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Employer disputes authenticity"That conversation never happened" is impossible to refute with a JPEG alone.
What a certified workplace-evidence package contains.
Browser session video
Recording of Slack, Teams, or webmail with messages visible in their original context.
Network log
Proof of which platform served the messages and at what time.
RFC 3161 timestamp
Independent third-party signature anchoring the evidence to a specific moment.
SHA-256 hashes
Cryptographic fingerprints of every captured file.
Metadata ZIP
Manifest, signature, public key for independent verification.
How to preserve workplace evidence in five steps.
Document the file before, not after, filing a grievance.
1
Use your own device and accountPersonal Gmail, personal phone — never use the employer's device, which they can wipe.
2
Capture chat messages with a Browser SessionSlack, Teams, WhatsApp Web — all certifiable in real time.
3
Capture emails individuallyFor each relevant email, certify the webmail view or save the .eml.
4
Save schedule, rota, and HR portal pagesCertify any policy or schedule that may later be edited by HR.
5
Build a chronological fileEach certificate ID becomes an exhibit in your tribunal bundle.
How to capture each evidence type.
Slack, Teams, WhatsApp at work
Browser Session — scroll through the channel or chat in the controlled browser.
Email evidence
Webmail page certification or .eml as a File certificate.
Live HR portal interaction
Use a Browser Session to record schedule changes, policy edits, or termination notices in real time.
Workplace-evidence questions, answered directly.
How do I preserve Slack or Teams messages before HR removes them?
Open a Browser Session at /certificates/new, log in to Slack or Teams in the controlled browser, scroll through the relevant channels, and finish. The session video, network log, and signed PDF are bundled into one evidence package.
What digital evidence helps an employment tribunal claim?
Tribunals weigh contemporaneous records highly. Certified captures of messages, emails, schedules, or rota changes — each with a qualified RFC 3161 timestamp — form a strong contemporaneous file.
Can my employer detect that I captured this?
The capture happens in an isolated browser on our infrastructure. Your employer's admin tools cannot see instantproof.legal activity. Always check your employer's acceptable use policy before capturing on a work device.
What if HR has already deleted the messages?
Capture whatever remains accessible to you immediately — DMs in your inbox, threads in personal Slack workspaces, screenshots you already took. Even partial evidence with a certified timestamp can corroborate your narrative.
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?
The strongest workplace claims are built on captures made before the dispute became official.