Evidence from WhatsApp, Messenger and Instagram

Many small claims now rest on a chat thread: the agreement, the promise to pay, the excuses. This guide explains how to capture that evidence so it is complete, dated and attributable, what a judge will want to see, and what to keep after the claim is served.

Checked against official sources on 30 September 2026. Court fees from 13 July 2026; enforcement agent fees from 1 May 2026.

Key facts

The strict rules of evidence do not apply on the small claims track (CPR 27.8), so messages and screenshots are routinely considered; the question is whether they are complete and credible.
Export the whole chat as well as screenshotting it, keep the original device, and never delete the thread.
Record the identifier: the phone number for WhatsApp, the profile URL or user ID for Facebook, the handle for Instagram, with the date you captured it.
Each side must file and serve copies of the documents it relies on at least 14 days before the hearing and bring the originals to court.
If you later need to serve the claim by message, the court will want proof that the account is active and used by the defendant, such as read receipts and recent replies.

Why messages are good evidence, and where they fail

On the small claims track hearings are informal, the strict rules of evidence do not apply and the court may adopt any method of proceeding it considers fair (CPR 27.8). A judge will read a WhatsApp thread that shows what was agreed, what was paid and what was promised. The standard small claims directions list the kinds of documents usually needed in contract disputes: any written contract, photographs, plans, a list of what is complained of, estimates, invoices and receipts. A message thread often is the contract.

Where message evidence fails is on completeness and attribution. A handful of cropped screenshots with no dates, no sender name and gaps in the sequence invites the reply ‘that is out of context’. The steps below are designed to close those gaps.

Step 1: preserve the original

Keep the device the chat is on, and keep the chat. Do not delete the thread, clear the chat or reset the phone before the case is over.
Do not rely on screenshots alone. Export the chat too, so the court can see the whole sequence in order.
Capture the identifier now, before the other person changes a display name or profile: the phone number shown in the WhatsApp chat header, the Facebook profile URL and numeric user ID, or the Instagram handle. Screenshot the profile page with the date visible.
Capture the status signals: the ticks or ‘seen’ markers on your key messages, the ‘last seen’ or online indicator, and the date of the other person’s last reply.

Step 2: export the chat

In the current versions of the apps the route is usually as follows; the menus move from time to time, so check the app’s own help pages if a step does not match.

WhatsApp: open the chat, then on Android the three-dot menu, More, Export chat; on iPhone tap the contact or group name and scroll to Export Chat. Choose whether to attach media. The export is a text file (with media as separate files) that you can send to your email or save to cloud storage.
Facebook Messenger: Settings and privacy, Settings, Accounts Center, Your information and permissions, Download your information, then choose ‘Some of your information’ and tick Messages. Set the date range to ‘All time’ (the default covers only a year), choose HTML for a readable file or JSON for timestamps, and submit. Meta emails you when the download is ready; collect it within a few days.
Instagram: Settings and activity, Accounts Center, Your information and permissions, Download your information, then Messages, with the date range set to ‘All time’ and the format set to HTML or JSON.

Save the export in at least two places and do not edit it. If a message needs highlighting, do that on a separate copy.

Step 3: screenshots the court can follow

Screenshots remain useful because they show the thread as it appeared, including the read receipts an export may not carry. To make them usable:

Show the sender’s name, number or handle at the top of each screenshot.
Make sure the date and time of each message are visible; tap a message if the app hides them.
Capture the whole thread in order, with overlapping screenshots so there are no gaps.
Include your own device’s date and time in the status bar where possible.
Number the screenshots and put them in date order in your bundle, with a short index saying what each one shows.

Do not post the claim, the debt or the other person’s details publicly on social media. The courts have required personal data to be redacted where a method of service was public, and the private direct message is the right analogue. Public posting can also raise separate problems of its own.

Step 4: keep everything sent after service

Once the claim has been issued and served, the defendant’s later messages become evidence in their own right. In Pirtek (UK) Ltd v Jackson [2017] EWHC 2834 (QB) the court was satisfied the defendant had received the documents because what he later wrote contained information that could only have been gleaned from reading them. A reply that says ‘I have seen your claim’ or refers to its contents proves knowledge of the claim, and a message promising to pay can amount to an admission. Keep every message, voice note and reaction from the defendant after service, with its date, and do not respond in anger; anything you send can be read out too.

Using the evidence at each stage

In the letter before claim and the claim form. Refer to the messages by date (‘your message of 3 March 2026 agreeing to repay £800 by 30 April’). Online Civil Money Claims asks for a brief reason, a timeline of events and a list of evidence, and a chat export fits that structure well. See where and how to issue a claim.

Before the hearing. The standard directions require each party to file with the court and serve on the other side copies of all documents they intend to rely on at least 14 days before the hearing, and to bring the originals to the hearing. For a chat thread the ‘original’ is the device, so bring the phone charged and unlocked to that chat. See the hearing.

In a witness statement. A short statement explaining who the account belongs to, how you know, and what the messages show, verified with the statement of truth in Practice Direction 22 (‘I believe that the facts stated in this witness statement are true. I understand that proceedings for contempt of court may be brought against anyone who makes, or causes to be made, a false statement in a document verified by a statement of truth without an honest belief in its truth.’), lets the judge follow the exhibits.

If you need to serve by message. Where no postal address can be found, an application to serve by WhatsApp or direct message must show the court that the account belongs to and is used by the defendant. Judges have relied on prior successful communication on the exact channel with delivery indicators (in a 2026 Telegram case, a screenshot showing two green ticks), on historic use of the channel about the very subject matter, and on evidence that the person is using that number and is likely to receive the message. The identifiers, read receipts and last-reply dates captured in Step 1 are that evidence. See serving by WhatsApp, Facebook or Instagram and finding someone’s address. For your own thread, ask ClaimsBot.

Ask ClaimsBot about this

Have a question this guide does not answer? ClaimsBot gives general information from the rules and official guidance. It is not advice about your case.

Ask ClaimsBot Start my claim

Sources

Quick answers

Are WhatsApp messages admissible in a small claims hearing?

Yes. The strict rules of evidence do not apply on the small claims track and the court may adopt any fair method of proceeding (CPR 27.8). What matters is that the messages are complete, in order, dated and attributable to the other party.

Should I screenshot the chat or export it?

Both. An export gives the court the whole thread in order; screenshots show it as it appeared, including read receipts and the sender’s name or number. Keep the original device as well.

How do I prove the account belongs to the defendant?

Record the phone number, profile URL, user ID or handle with the date captured, and keep evidence that the person used that account to make the agreement, send bank details or reply recently. Delivery and read indicators on your messages help.

When do I have to send my messages to the other side?

The standard small claims directions require each party to file and serve copies of all documents they rely on at least 14 days before the hearing, and to bring the originals to the hearing.

Can I use messages the defendant sends after they receive the claim?

Yes, and you should keep them. Courts have treated a defendant’s later messages as proof that they received and read the claim, and a promise to pay can be an admission.

Is it safe to post about the debt on Facebook to pressure them?

Public posting is not the same as private messaging and can cause problems of its own. Courts have required personal data to be kept out of public channels; keep communication to private messages and the court process.