It can be. A WhatsApp message can form a binding contract if it shows a clear offer, a clear acceptance and an intention to be bound. An English court has enforced a deal made on WhatsApp, a Singapore court relied on WhatsApp messages and an email, and a Canadian court treated a thumbs-up text as agreement. A casual chat that never reached a firm deal won’t bind anyone, and some contracts must be made in a particular form whatever you agreed on chat.
This is general information and it isn’t legal advice. If there’s real money at stake, ask a lawyer.
What makes a message binding
The app doesn’t change the test. Courts ask the same things they would ask about a letter or an email:
- Settled terms. For example what’s being done, for how much, and by when.
- An offer and an acceptance. “Sounds good, let me think” usually isn’t acceptance. “Yes, agreed, start Monday” probably is.
- An intention to be bound. Friendly plans often don’t count.
- Something given by each side. Countries such as the UK and US also need this, for example work in exchange for payment.
Judges go by what you wrote to each other. The UK Supreme Court said in RTS Flexible Systems v Molkerei that it depends on “what was communicated between them by words or conduct”. What you privately meant doesn’t decide it.
Cases where chat messages were binding
- England. In Jaevee Homes v Fincham (2025), the judge said the exchange of WhatsApp messages, “whilst informal, evidenced and constituted a concluded contract”.
- Canada. In South West Terminal v Achter Land (2023), a thumbs-up by text accepted a contract for flax. The appeal failed by two judges to one, and the Supreme Court of Canada refused to hear it in 2025.
- Singapore. In Siong Ann Engineering v Pure Group (2022), WhatsApp messages, an email and the parties’ conduct showed they had agreed a price.
- India. Section 10A of the IT Act says a contract isn’t unenforceable just because it was made electronically. In Belvedere Resources v OCL Iron and Steel (2025), the Delhi High Court found an arbitration agreement in emails and WhatsApp messages.
- Malaysia. The Electronic Commerce Act 2006 says a commercial contract can’t be denied effect because an electronic message was used to form it. The Federal Court treated a text message as a written acknowledgment of a debt in Yam Kong Seng (2014).
When a message isn’t enough
No firm deal. In South Africa’s Kgopana v Matlala (2019), the court found that a WhatsApp message “did not contain an offer”, so there was nothing to accept. In Singapore’s Tiger Pictures v Encore Films (2024), negotiations on WeChat and by email didn’t bind the parties, because they didn’t intend them to.
The contract needs a particular form. Some agreements must follow stricter rules, however clear your messages are:
| Country | Contracts with stricter rules |
|---|---|
| England and Wales | Land sales must be in writing, with all the terms in one signed document. Guarantees need signed writing. |
| United States | Wills and family law matters fall outside the federal e-signature law. Sales of goods of $500 or more need some writing under the model code, which each state adopts in its own form. |
| South Africa | Land sales, long leases, wills and bills of exchange are outside the ECT Act. |
| India | Wills, trusts, powers of attorney, land sales and most negotiable instruments are outside the IT Act. |
Even within a country, courts can differ. In Ross v Garvey (2025), a British Columbia judge said a thumbs-up wasn’t a signature on a land contract. An email footer, on the other hand, was enough in the English land case Neocleous v Rees (2019).
How to make a chat agreement clearer
If you’re agreeing something on WhatsApp right now, these steps avoid most arguments later:
- Put the terms in one message. Say what will be done, the price and the date.
- Ask for a clear reply. “Yes, agreed” is better than an emoji or silence.
- Follow up in writing for anything big. An email or short signed contract saves a lot of trouble.
- Turn off disappearing messages in that chat. Otherwise the agreement can vanish on its own.
If you’re relying on messages from the past
Keep the chat on your phone and export the whole conversation. The messages before and after the key one matter, because they show what you both meant. If a dispute is about unpaid work, our page on getting paid when the agreement is only on WhatsApp goes through it.
To find the message in a long chat, open your export on Chatonfile.com and search it for free on your device. If you order a PDF, its summary lists the key highlights and promises, each pointing to the numbered message it came from. A court will still read the messages themselves, so check them against the summary.
Common questions
Does a thumbs-up on WhatsApp count as agreement?
It can. A Canadian court treated a thumbs-up text as accepting a contract for flax, and that decision survived an appeal. A British Columbia court later said a thumbs-up was not a signature on a land contract. It depends on the facts and on the law where you are.
Can a WhatsApp message prove someone owes me money?
It can help a lot. A message where someone admits the debt, or agrees an amount and a date, is useful evidence. Malaysia's highest court treated a text message as a written acknowledgment of a debt. Keep the whole chat, because the messages around it show what it meant.
Is a WhatsApp message legally binding in the UK?
It can be. In Jaevee Homes v Fincham in 2025, the High Court in England found that an informal exchange of WhatsApp messages formed a concluded contract. Land sales and guarantees have stricter rules.
Is a WhatsApp message legally binding in South Africa?
It can be, because the law accepts agreements made by data message, apart from some contracts such as land sales and wills. In Kgopana v Matlala, the court found a WhatsApp message did not contain an offer, so no contract was formed.
