WhatsApp and Text Messages in UK Employment Tribunals

The careful answer on WhatsApp messages

People often ask, “Are WhatsApp messages admissible in court in the UK?” An employment tribunal is not an ordinary civil court, and “admissible” is too blunt a label. Tribunals manage evidence under their procedural rules and orders. A relevant chat may be considered, while its completeness, authorship, meaning, and reliability affect the weight it receives.

A screenshot is not automatically rejected because it is a screenshot. Nor is it automatically true because it looks like WhatsApp. The other party may say the exchange is cropped, the contact name was user-assigned, a message is missing, the phone’s date was wrong, or words were ironic. The tribunal considers the material in the case as a whole.

Present the message for a defined reason. It may record an instruction, complaint, response, reason given at the time, shift allocation, warning, or contemporaneous account. Link it to a pleaded issue and witness evidence. Do not bury a useful exchange inside thousands of irrelevant pages.

Which rules apply now

The Employment Tribunal Procedure Rules 2024 took effect on 6 January 2025. They replaced the 2013 rules and apply across England, Wales, and Scotland. The Judiciary’s guidance page says existing Practice Directions and Presidential Guidance remain effective as described, with old rule references read against the 2024 rules and conversion table until reviewed.

Rule 30 gives the tribunal a broad power to make case-management orders. Rule 33 permits orders for disclosure or inspection of documents and information. Rule 34 permits orders requiring a person in Great Britain to attend, give evidence, produce documents, or provide information. Those powers mean the order in the individual case is essential reading.

The tribunal may order lists of issues, disclosure, witness statements, an agreed bundle, a chronology, a cast list, or other steps. Dates and responsibilities differ. If an order says one party prepares the bundle, both parties may still have duties to cooperate and identify documents. If compliance is impossible, apply promptly with reasons; do not ignore the date.

Time limits as of 29 September 2026

Acas’s page updated in September 2026 states that, on 29 September 2026, the usual time limit for most claims was three months minus one day. A few categories had six months minus one day, including the examples Acas lists. The event that starts time differs by claim: dismissal, nonpayment, and discrimination can raise different questions.

Acas also states that from 1 October 2026 the limit for most claims increases to six months minus one day, but only if the time limit starts on or after 1 October 2026. This was the practical commencement position relevant to the Employment Rights Act 2025 change. It does not safely answer a case straddling the date. Use the current calculator guidance and get advice.

Do not wait to finish a grievance, appeal, investigation, or message export. Acas explicitly says those internal procedures do not change the tribunal limit. Some applications, including interim relief in qualifying cases, can have much shorter limits.

Acas early conciliation

Prospective claimants ordinarily must notify Acas before presenting an ET1, subject to exemptions. Acas offers early conciliation, in which a conciliator communicates separately with the parties to explore settlement. It is impartial and does not decide the case.

Acas says notification within the tribunal time limit pauses that limit while early conciliation runs. When it ends, Acas issues a certificate and the number is ordinarily needed for ET1. Acas explains that a person who notified in time will have at least one month from receiving the certificate, but exact calculations can be complicated.

Record the event date, notification submission, Acas reference, certificate date, and claim submission. Do not derive the filing date from a generic example. Acas cannot decide whether a claim is in time; the tribunal does.

Preserve workplace chats lawfully

Preserve the original phone, account, app, and complete relevant conversation where possible. Export before access ends. Keep attachments in original form. Record participants, numbers or handles, date range, platform, time zone, export method, and any missing media.

Do not bypass company controls or take material you are not entitled to access. A personal phone can contain a company-controlled account. A company account may contain privileged advice, trade secrets, customer information, medical data, or unrelated employee details. Ask a representative how to identify and preserve relevant material without unlawfully copying it.

If the employer controls the account, send a focused preservation request identifying custodians, channels, and dates. Disclosure may later provide material. Rule 33 gives the tribunal an order-making power, but it is not permission for self-help access.

Keep full threads even if the eventual bundle uses extracts. Preserve your own unfavorable messages too. Deleting them after a dispute arises may damage credibility and create procedural problems. Do not edit sender names or message text in the source.

Disclosure comes before presentation

Disclosure and the hearing bundle are different. Disclosure is the process of identifying and exchanging documents under the order. The bundle is the organized set needed for the hearing. A message may need disclosure even if neither party ultimately puts it in the bundle.

Relevance is not the same as helpfulness. Follow the wording of the order and obtain advice on privilege, confidentiality, redaction, and scope. Do not withhold a relevant exchange merely because it weakens your account. Equally, do not demand every message ever sent by a manager without connecting the request to an issue.

Prepare a message schedule with date, participants, channel, short description, source file, and proposed bundle status. This helps identify duplicates and missing attachments. If a document is unavailable, state what was searched and why it may be missing rather than recreating it.

Citizens Advice explains that case-management orders can require lists, document exchange, witness statements, and preparation of the hearing bundle. It also warns that noncompliance can have serious consequences. The order, not a generic web template, controls.

Build the hearing bundle

The common practical convention is a single indexed, paginated set arranged in a useful order, often with documents chronological within sections. Follow the case order and current regional directions. Do not assume general civil-court e-bundle guidance automatically governs an employment tribunal.

For chat material:

1. show the platform and conversation;
2. identify each sender by name and number or handle where available;
3. show full dates, times, and the time zone if relevant;
4. retain reply links, edit labels, reactions, and attachment references;
5. include enough preceding and following messages for fair context;
6. use legible text, not tiny phone screenshots;
7. put exchanges in chronological order; and
8. assign continuous bundle page numbers.

The index entry should be descriptive: “WhatsApp exchange between A Khan and R Jones, 12–14 March 2025,” not “screenshots.” If one conversation appears in several issue sections, avoid unnecessary duplicate copies. Use cross-references.

The live Bates-numbering tool runs in the browser without uploading the PDF. Numbering supports navigation; it does not verify message content. Follow any required page-number format and distinguish the PDF’s physical page count from a Bates label if both appear.

Connect messages to witness statements

A witness should explain how they know the account, device, participants, and collection method. They can describe receiving or sending the exchange and what happened around it. They should not claim technical certainty they do not have.

Cross-reference exact bundle pages: “On 14 March I told Ms Jones the rota change prevented childcare collection (bundle 214–215).” If the message was written later, do not call it contemporaneous. If a display name is your address-book label, say so and provide the underlying number where appropriate.

Anticipate ordinary questions:

• Is this the complete exchange for that day?
• What occurred during the omitted gap?
• Was there a phone call between these messages?
• Who controlled the account?
• Has the original device been retained?
• Were timestamps converted?
• Why is an attachment unavailable?

A candid limitation note can answer these before they become a distraction.

Context, redaction, and privacy

Selective excerpts can mislead. Keep enough context to show what prompted a reply and what followed. Where a long group chat contains unrelated discussion, agree a proportionate extract if possible, identify the omitted range, and retain the source.

Redact only on a copy. Mark redactions and keep a log. Payroll numbers, home addresses, children’s information, medical details, and unrelated third-party conversations may need careful handling. The tribunal may decide disputes about relevance and privacy. Ask for a case-management direction rather than making irreversible changes.

Do not post the bundle publicly or use an open sharing link. Tribunal hearings and judgments have public aspects, but that does not make unrestricted publication of private workplace records appropriate.

Covert recordings

Recordings sometimes arise alongside chats, but they require separate analysis. Whether making or using a recording is lawful and fair can depend on the circumstances, policies, privacy rights, content, and tribunal directions. A recording may also include legally privileged or highly private discussion.

Do not treat covert recording as a routine preservation method. Seek advice before recording, transcribing, disclosing, or relying on one. If a recording already exists and is relevant, preserve the original file and do not edit it; obtain advice on disclosure and any transcript.

A practical final review

Before exchange or filing, verify that every message page is readable at ordinary zoom, every index entry reaches the right page, and statement references match. Search for duplicated and upside-down pages. Check that names and numbers are consistent and that dates have not switched between US and UK formats.

Keep three distinct sets: preserved source, disclosure set, and final bundle. Record the hash or file size of finalized versions if useful for version control, but do not describe that as proof of the original conversation. Keep delivery receipts and the exact version sent.

Acas, Citizens Advice, a union, a law center, or an employment adviser may help. Seek urgent advice on limitation, interim relief, whistleblowing, discrimination, dismissal, anonymity, or sensitive evidence. A well-organized chat record can support testimony, but the tribunal controls procedure and decides the evidence’s weight.