Without Prejudice and What the Phrase Is Protecting

This is written to be used rather than admired. Each section below is a decision about protection for settlement negotiations, and each one has a default.

The problem it solves

A party who offers to settle is implicitly acknowledging some risk in their position, which the other side could otherwise use against them. If every settlement offer could be shown to a judge as an admission, nobody would ever make one and disputes would rarely resolve. Legal systems therefore protect genuine settlement communications from being put before the court deciding the underlying dispute.

The protection exists because the system wants settlements, and settlements require the freedom to explore compromise safely. The doctrine's name and precise scope differ between jurisdictions, though the underlying policy is very widely shared.

What the protection covers

The protection generally applies to communications that are a genuine attempt to settle an existing dispute. It typically covers letters, emails and meetings, and it usually applies whether or not the magic words were used. Conversely, writing the label on a document that is not a settlement attempt does not create protection that would not otherwise exist.

Courts look at substance, so a routine invoice chaser marked without prejudice remains a routine invoice chaser. This is why the label should be used deliberately rather than added to correspondence as a general precaution.

Without prejudice save as to costs

A variation used in several systems allows a settlement offer to be kept from the judge deciding the merits but shown when costs are decided. The point is that a party who refused a reasonable offer and then did worse at trial should face consequences on costs. That mechanism substantially sharpens the pressure to engage seriously with settlement offers.

On the face of the agreement, formal offer regimes with defined costs consequences exist in a number of jurisdictions under various names. The rules are technical and their tactical use is one of the clearest reasons to have a lawyer running a dispute.

The exceptions

Protection is not absolute, and most systems recognise exceptions where the communications are relevant for another purpose. Establishing whether a settlement was actually reached is the most common exception, since the negotiation is the only evidence of it. Communications used to disguise threats, blackmail or clear impropriety are generally not protected.

Some systems allow the protection to be set aside where it would otherwise conceal a serious injustice.

The categories differ between jurisdictions, and none of them should be relied on without proper advice.

Open correspondence

Letters marked open are intended to be seen by the court and usually set out a party's position on the merits. The distinction matters, because a party often wants some correspondence on the record and some kept off it.

Mixing settlement discussion and open assertions in a single letter creates confusion about which protection applies. Keeping the two strands in separate letters is standard practice among lawyers for exactly that reason. Marking each letter deliberately, rather than habitually, is what makes the distinction work.

Practical use by non-lawyers

People handling their own disputes frequently use the phrase without understanding what it does or when it applies. The most common error is treating it as a general confidentiality label, which it is not. The second most common is assuming that an unlabelled settlement discussion is unprotected, which is often wrong.

Where a dispute goes formal, where a dispute is significant enough to involve settlement offers, it is usually significant enough to justify advice. A short consultation before sending an important letter is far cheaper than dealing with its consequences.

The takeaway

The phrase protects genuine settlement attempts, and nothing else it is stuck on. General explanation only, and not legal advice.

Understanding a process is not the same as being represented in it.