In plain terms
The label marks a communication as part of settlement talks rather than as a formal position that can be quoted back at you in court. The protection rests on public policy: the law wants to encourage people to settle disputes rather than litigate, so it removes the fear that an offer or concession made to reach agreement will later count as an admission of liability. 1 WLR 2436]
Two conditions matter. First, there must be an existing dispute or difference that the parties are trying to resolve. Second, the communication must be a genuine attempt to settle it. Simply stamping “without prejudice” on a document does not create protection where there is no dispute, and, conversely, forgetting the label does not remove protection from a communication that is plainly part of negotiations. The substance controls, not the wording.
The privilege is normally joint. Because it protects both sides, one party cannot unilaterally waive it and put the correspondence before the court; as a rule both must agree to lift it.
Why it matters in a contract
Commercial disputes often begin as a contract disagreement: a late delivery, a disputed invoice, an alleged breach. Handling the negotiation correctly protects your position. If your settlement letters are properly without prejudice, you can offer a commercial figure to end the matter without that offer being read as an admission that you were in breach.
Getting it wrong cuts both ways. An open letter (one not marked, or not genuinely part of settlement) can be produced at trial, so a loosely worded concession may damage your case. It is good practice to keep negotiation correspondence clearly separated from open, contractual correspondence. A contract repository with a searchable audit trail, such as Pactolane, helps you keep that record organised and retrieve the right thread quickly, while PactAI’s conversational chat can help you locate and review the relevant exchange.
Watch the costs angle too. Marking an offer “without prejudice save as to costs” (a Calderbank offer) keeps it out of the trial on liability, but allows it to be revealed to the court on the separate question of who pays the costs once the outcome is known.
Example
A supplier and a buyer dispute whether goods were defective. The buyer’s solicitor writes a letter headed “without prejudice” offering to accept a 40 per cent refund to close the matter, adding that the buyer “just wants to move on”. Negotiations fail and the case goes to trial. The buyer’s offer and the “move on” comment cannot be put before the judge as evidence that the buyer’s claim was weak, because the letter was a genuine settlement attempt in an existing dispute. Had the same figure been floated in an open email with no dispute yet in existence, the supplier could likely rely on it.
General legal information, not legal advice.
Frequently asked questions
What does "without prejudice" mean?
Without prejudice is a rule of English law that stops genuine settlement communications in an existing dispute from being used in court as evidence of an admission. It exists so that parties can negotiate openly, including making concessions or offers, without fearing that those statements will later be quoted against them at trial. The protection depends on the substance of the communication, not merely on the label attached to it.
Does writing "without prejudice" on a letter always protect it?
No, the label alone does not guarantee protection. For a communication to be genuinely without prejudice there must be an existing dispute, and the communication must be a real attempt to settle it. If you stamp "without prejudice" on an ordinary letter where no dispute yet exists, a court can disregard the label and treat the letter as open and admissible.
What is "without prejudice save as to costs"?
"Without prejudice save as to costs" is a settlement offer, often called a Calderbank offer, that stays protected during the trial on liability but can be shown to the court afterwards when it decides who pays the costs. It lets a party make a reasonable offer the judge cannot see while ruling on the merits, yet still rely on that offer to argue about costs once the result is known. This can protect a party who made a fair offer that the other side unreasonably rejected.
When can without prejudice material be shown to a court?
Without prejudice protection is not absolute, and several recognised exceptions apply. Courts can look at the communications to decide whether a binding settlement was actually reached, to address alleged misrepresentation, fraud or undue influence, or where a party has used the privilege as a cloak for unambiguous impropriety such as a threat. The exceptions are narrow, so most genuine negotiation content remains protected.
Can one party alone waive without prejudice protection?
As a general rule no, because the privilege belongs to both parties to the negotiation. Since it protects each side, both usually have to agree before the correspondence can be put before the court. This differs from ordinary confidentiality, which one party may sometimes waive on its own.
Is a without prejudice offer legally binding?
A without prejudice offer is not binding simply because it was made; it becomes binding only if it is accepted and the usual requirements for forming a contract are met. Until acceptance, the offer is just part of the negotiation and can be withdrawn or changed. Once a settlement is agreed, the without prejudice communications can be referred to in order to prove the terms of that agreement.
Related terms
Not to be confused with
Comparisons that clarify this term.
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