Yes, if you agree the essential terms of a deal and appear to intend to be bound, you may already have a contract — regardless of how informal the communication is.
Recent cases have brought this into focus, particularly regarding WhatsApp.
The Law (basics)
A contract exists if there is:
- an offer
- an acceptance
- something of value (consideration)
- and an intention to create legal relations
There is no requirement for a signed written document.
Where things go wrong
The issue isn’t that contracts can be formed informally. It’s that, in practice, contracts are often formed earlier and on worse terms than people realise.
1. You agree the deal before your protections exist
A typical scenario:
- you agree price, scope and timing informally
- your standard terms are sent later
- they are never formally accepted
You still have a binding agreement — just not one on your terms.
The usual problem:
- your limitation of liability may not apply
- your payment terms may not apply
- structured risk allocation never became part of the contract
2. Informal messaging creates incomplete contracts
Short-form exchanges tend to be quick and commercial:
- “We’ll do it for £25k all in”
- “Yes agreed — let’s get started”
That may fix:
- price
- an implied scope
- an expectation to perform
But it won’t deal with:
- delays
- variations
- defects
- termination rights
You are left with a contract that exposes your business, without the protections you normally rely on.
3. You lose the ability to walk away
Another common situation:
- a deal is agreed informally
- a better opportunity arises
- you try to step back and receive a formal reminder that the other person sees things differently
Now you have:
- damages exposure
- reputational impact
- or even urgent court action
4. Your team binds the business without realising
In many SMEs:
- sales teams
- directors
- operational staff
regularly confirm deal terms informally to keep things moving.
But those exchanges can:
- commit the business legally
- override later contract negotiations
- undermine internal approval processes
The business becomes bound before it has applied any real control.
5. You create liabilities your insurance may not absorb
This is where the risk deepens.
Most SME insurance arrangements are structured on the assumption that:
- contracts are properly controlled
- risks are limited through agreed terms
- liabilities are predictable
If a contract is formed informally:
- key protections (like liability caps) may never apply
- obligations may be wider than expected
- risk allocation may shift significantly
That can raise difficult questions in the event of a claim:
- whether you have assumed additional contractual liability
- whether policy conditions have been complied with
- whether the insurer expected risk to be managed through agreed terms
In practice, an informal contract doesn’t just affect legal exposure — it can affect whether your insurance responds in the way you expect.
What this means in practice
The issue here isn’t about avoiding WhatsApp or slowing down the business. It’s about regaining control over how contracts are formed.
Two areas are particularly critical:
1. Getting your standard terms right
Your terms should:
- clearly set out liability limits
- deal with payment, delays and variations
- reflect how your business actually operates
But just as importantly, they need to be:
- usable in real-world scenarios
- not overly complex or disconnected from how your team communicates
2. Making sure your terms actually apply
This is where many businesses fall down.
Standard terms do not protect you unless they are:
- introduced early
- properly communicated
- and accepted
In a world of informal messaging, that means thinking carefully about:
- how and when terms are referenced
- whether acceptance is being captured
- how your team communicates with customers
Consistent wording, clear references, and process discipline can make a significant difference.
Take this away
The risk here isn’t complexity — it’s familiarity. WhatsApp messages feel quick and informal; they are often treated as operational rather than legal.
In reality, the same message that moves a deal forward commercially may also create a binding contract — one that fixes your position, removes your protections, and exposes your business in ways that your insurance may not fully accommodate.
For SMEs, this isn’t just a legal technicality. it’s about ensuring that:
- your contracts reflect your intentions
- your risk is properly controlled
- and your protections — both contractual and insurance‑based — actually work when you need them to.
Get in touch
Parkinson Wright can help you prepare your standard terms to get them right, ensure they are properly incorporated into your day‑to‑day communications, and support you if things go wrong — from managing disputes and defending claims to advising on insurance coverage and recovery. Contact Neil Malone, Solicitor or a member of the commercial team on 01905 721600 or via email: worcester@parkinsonwright.co.uk
This article is intended as a general overview and does not constitute legal advice.