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Keeping Evidence and Logs
How to evidence your grievance for tribunals.
Last updated 21 February 2026
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Request relevant personal data from your employer
Prepare a focused employment Subject Access Request for personal data such as relevant workplace emails, HR records and meeting notes.
Overview
If your grievance ends up in a tribunal, the outcome often depends on 'contemporaneous evidence'—records made at the time the events happened.
A private diary or log is much more persuasive than trying to remember dates months later.
What you can do
- Keep a log of dates, times, locations, and witnesses.
- Forward non-confidential evidence (like threatening emails or changed rotas) to a personal account, being careful not to breach GDPR or company policy.
Key guidance
Grievances and appealsPlan a workplace grievance or disciplinary appeal, preserve evidence and understand how the ACAS Code can affect a later Employment Tribunal claim.ET1 preparationPrepare the facts, claims, dates, ACAS details and remedy information needed for an Employment Tribunal ET1 claim form.
Next steps
Keep your facts organised and protect your time limits with the tools below.
Start case check