How to Organise WhatsApp Messages and Screenshots for a Workplace Grievance

If your workplace grievance involves bullying, harassment, discrimination, unfair treatment or a dispute with your manager, some of your most important evidence may not be sitting neatly in an HR file.

It could be on your phone.

WhatsApp messages, screenshots, Teams conversations, text messages and emails can help establish what happened, when it happened and who was involved.

The problem is that many employees accumulate dozens — sometimes hundreds — of screenshots without knowing how to turn them into evidence that someone investigating their grievance can actually follow.

If you are raising a grievance without a solicitor or union representative, organising that evidence properly can make your case much easier to understand.

This guide explains how to organise WhatsApp messages and screenshots for a workplace grievance.

Can WhatsApp Messages Be Used as Evidence in a Workplace Grievance?

Potentially, yes.

A WhatsApp conversation, text message, email or screenshot may be relevant to an internal workplace grievance if it helps demonstrate an event or communication connected with your complaint.

For example, messages might help establish:

• what was said;

• when it was said;

• who was involved;

• how a manager responded to a complaint;

• whether instructions were given;

• whether your account is consistent with contemporaneous communications; or

• whether another employee witnessed what happened.

The key issue is not simply how many screenshots you have.

It is what each piece of evidence helps to establish.

Twenty well-organised messages connected to specific allegations can be far more useful than 300 screenshots submitted to HR without explanation.

Step 1: Preserve the Original Messages

Before reorganising anything, think about preserving the original material.

Where appropriate, retain the original conversation rather than relying entirely on cropped screenshots.

For WhatsApp conversations, for example, the application's export functionality may allow you to create a record of a conversation.

You may also want to retain relevant screenshots where the visual context is important.

Be careful about confidentiality and data protection. A workplace dispute does not automatically give you the right to copy confidential company information or other people's personal data.

Do not indiscriminately download company files or confidential material simply because you think it might be useful later.

Step 2: Don't Crop Away Important Context

A screenshot reading "That's exactly what I told them." may mean very little on its own. The messages immediately before and after it could completely change its meaning.

When taking screenshots, consider whether they show enough surrounding context for another person to understand:

• who is speaking;

• what is being discussed;

• the date;

• the time; and

• what prompted the response.

Avoid editing screenshots in a way that could create questions about whether the evidence has been altered.

Step 3: Create an Evidence Index

This is where a folder of screenshots starts becoming an evidence bundle.

Give important pieces of evidence a simple reference.

For example:

E001 – WhatsApp conversation with line manager – 12 March 2026

E002 – Email from HR – 14 March 2026

E003 – Screenshot of Teams conversation – 18 March 2026

E004 – Meeting notes – 20 March 2026

You can then refer to those evidence numbers throughout your grievance.

Instead of writing: "My manager then admitted on WhatsApp that he knew what had happened." you can write: "On 12 March 2026, my manager sent me a WhatsApp message acknowledging that he was aware of the incident (Evidence E001)." That makes the allegation considerably easier to investigate.

Step 4: Connect Every Important Screenshot to an Event

Evidence needs context.

For every important message or screenshot, record:

Date: When did it happen?

People: Who sent or received the communication?

Event: What was happening at the time?

Evidence: What does the message actually show?

Relevance: Which part of your grievance does it support?

For example: 15 March 2026 – WhatsApp message from manager

My manager messaged me at 21:14 stating that I should "think carefully about taking this further".

Evidence: E007

Relevant to: My allegation that I felt pressured after raising my complaint.

This creates a link between your chronology, your allegations and your evidence.

Step 5: Separate Facts From Your Interpretation

This is particularly important when you are preparing a grievance without legal or union representation.

Suppose a manager sends "We need to discuss your future here tomorrow."

You might believe this was a threat. But your evidence description should avoid claiming that the screenshot objectively proves something it does not.

Instead, distinguish between the evidence and your interpretation.

For example:

Evidence: My manager wrote, "We need to discuss your future here tomorrow."

My concern: This message was sent shortly after I raised my complaint and I understood it as suggesting my employment could be affected.

That distinction can make your grievance sound more measured and credible.

Step 6: Build a Chronology

Once your evidence has been indexed, place the important events into chronological order.

A simple chronology could look like this:

3 February: Initial incident with manager – E001

5 February: I complained informally – E002

7 February: Manager responded by WhatsApp – E003

12 February: HR meeting – E004

14 February: Follow-up email to HR – E005

21 February: Further incident – E006

An investigator can now understand the sequence without searching through hundreds of screenshots.

Step 7: Don't Submit Everything Just Because You Have It

More evidence does not necessarily mean stronger evidence.

Ask yourself:

What does this document prove?

If you cannot answer that question, consider whether it needs to be included.

Your objective should be to help the grievance investigator understand your case, not make them search through hundreds of pages looking for the important evidence themselves.

What If Messages Have Been Deleted?

Do not recreate or alter evidence.

Instead, record what you remember happened, when it happened, who was involved and whether anybody else witnessed it.

There may also be other records that help establish the event.

These could include:

• emails;

• calendar invitations;

• meeting notes;

• phone records;

• HR correspondence;

• witnesses; or

• subsequent messages referring to the incident.

In some circumstances, a Data Subject Access Request may also help you obtain personal data held about you, although a DSAR is not a general evidence-disclosure process and does not entitle you to every company document connected with your dispute.

Should I Send Screenshots With My Grievance Letter?

There is no universal answer.

It will depend on the nature of the grievance, your employer's procedure and the volume and importance of the evidence.

But your grievance should make it clear what evidence supports the important allegations.

If you have a large amount of material, an indexed evidence bundle can be considerably easier to navigate than embedding dozens of screenshots into the grievance letter itself.

How Marcas Can Help Organise Your Grievance Evidence

If you are dealing with a workplace dispute without a solicitor or union representative, one of the biggest challenges is turning months of messages, screenshots and documents into something coherent.

Marcas helps you organise your workplace evidence into a structured case.

Instead of relying on a folder containing files called "Screenshot 1837", "Screenshot 1838" and "Screenshot 1839", you can start connecting evidence to the events and issues that actually matter.

Use the Marcas Evidence Bundle Tool to organise your evidence, build your timeline and create a clearer presentation of your workplace case.

Raising the Grievance Yourself?

Evidence is only one part of the process.

You also need to decide what allegations to raise, how to structure the grievance, what outcome to request and how to prepare for the grievance meeting.

For the complete process, read our guide:

How to Raise a UK Workplace Grievance Without a Union Rep or Solicitor

Before submitting your grievance, you can also Run Your Free Case Health Check to identify potential gaps in the way your case has been prepared.

The objective isn't to collect the most evidence.

It's to make the evidence you already have easy to understand, easy to navigate and clearly connected to your grievance.