How to Review an Express Duty to Mitigate in a Commercial Contract

Friday 9 October 2026 is the signature date. Meinir reviews a 16-person UK brand of ceramic butter dishes. The dishes leave a Tenby workshop. English law, and the courts of England and Wales.

The packet — papers you will sign — is a fulfilment MSA — the master services agreement — with Aeron Pack Ltd in Birmingham.

The hidden risk sits in clause 14.2. For example, she must take all reasonable steps. She shall not recover unless those steps come first. The costs are not recoverable. Any sum is subject to the cap in clause 18. Clause 12 is payable in full, with no duty to mitigate.

A Bath debit dated 18 September 2026 is about £4,860. That note is not a court finding. A lid reprint dated 22 September 2026 cost £920. The glaze was wrong. The lids did not cut the debit. The invoice is this packet, not a market cost.

Slack says the steps line is just the law, and that efforts language is the same line, only softer. It says Aeron pays the £920, Meinir must prove the try, and the indemnity lifts the debit out of the cap. That is the typical mistake. The pressure is Friday.

Disclaimer: Checkory provides AI support, not legal advice. Consult a qualified lawyer for binding decisions.

How do you split a mirror from a recovery bar?

Common law already cuts loss she unreasonably failed to avoid. It is not a positive duty to act. Read the express line before you call it a photocopy.

Farrer, on 2 December 2021, records Mr Justice Kerr in Equitix. The rule is not a true duty. The claimant cannot recover for loss unreasonably not avoided.

Viscount Haldane in British Westinghouse said the same thing. Take reasonable steps. Do not act outside the ordinary course of business.

Kerr J read “all reasonable action to mitigate” as a mirror of that rule. He did not raise it to best endeavours. Taylor Wessing says the words meant action it would be unreasonable not to take.

Farrer says those words can look like a higher positive duty. The same phrase can be a mirror or a harder bar. Do not crown either view as Meinir’s result.

In practice, clause 14.2 does both jobs. “All reasonable steps” can be the mirror. “Shall not recover unless” is a bar. Silence still leaves the common-law cut. The bar is the extra problem.

How do you compare steps with commercially reasonable efforts?

Slack treats commercially reasonable efforts as a softer copy of all reasonable steps. Check the verb. They are not the same job.

Taylor Wessing says “all reasonable action” was not best endeavours. It did not force a claim against a third party. A sensible list from the breaker is not proof she failed.

An A&O Shearman note agrees. The words did not become best endeavours, and they did not require uncertain litigation. Do not move a share-value measure onto this debit.

Commercially reasonable efforts is an efforts clause. Use the endeavours review for that ladder. Clause 14.2 does not use efforts language.

Efforts ask which tries a business would make. Avoidable loss asks which loss drops because a step was skipped. “Shall not recover unless” is a condition. Treat “softer law” as the error. A red flag is both labels plus unless.

Who pays a mitigation cost when the try fails?

A reasonable extra cost can be recovered. A proven money benefit is credited. A failed try is not automatically Meinir’s bill, and not automatically Aeron’s.

A CMS note on Thai Airways v KI Holdings states the cost rule. Reasonable mitigation spend can be damages. The breaker must show a course that would have avoided an identifiable slice.

Do not copy that note’s currency sums. The £920 is this reprint. The £4,860 is this debit.

Lord Macmillan, as PNC Legal sets out from Banco de Portugal v Waterlow, warned against nice scales. Do not judge the emergency step with hindsight.

The step still has to be reasonable. The wrong glaze does not prove it was. Clause 14.2 says the costs are not recoverable. In practice, that reverses the cost rule. These lids did not cut the debit.

Who must prove a failure to mitigate?

At common law the contract-breaker usually proves the failure. Clause 14.2 may ask Meinir to show the steps first. Flag that flip. Do not call it decided.

Taylor Wessing says the sellers had to show an unreasonable failure. A sensible list from them was not enough. The criticism comes from the party in breach.

The CMS note puts the same burden on the wrongdoer. He must show a course that would have avoided an identifiable part of the loss.

“Shall not be entitled unless” can look like a flipped file. She would show the steps before the sum is open. That is the risk, not a judgment. Escalate if you cannot tell who must prove the gap.

Which cap question does this sentence actually open?

The sum that meets a cap is usually the loss after avoidable loss is cut. Clause 14.2 does not say whether clause 18 sees £4,860 or a smaller figure.

Open the liability-cap review for the cap number and for what sits inside it. Prior fees of about £19,200 are this ledger. Clause 18 prints no figure. They are not the answer.

An Osborne Clarke note says draft two choices. Does the cap limit the indemnity? Must that party mitigate? Sample lines include a mitigate duty, and a line that recovery is not subject to one.

Those lines are samples, not a statute. They do not hold that clause 12 lifts the Bath debit out of clause 18. Clause 12 says payable in full, with no duty to mitigate. Clause 14.2 still points at clause 18. Write both, then check the cap page.

When do you keep the mirror, strike the bar, or walk?

Keep the mirror if the sentence only repeats avoidable loss. Strike the unless-bar and the cost shift if they harden the rule. Walk if Friday needs all three left together.

Before you sign, point to one sentence that would pause Friday. The pause is the unless-bar, plus costs not recoverable, plus no duty to mitigate on the indemnity.

The £4,860 note is not a finding. The £920 invoice is this reprint only. Sign when those labels are on the log. The success bar is that pause, not a green light.

A Payzu v Saunders summary is colour only. A reasonable offer from the breaker can be a mitigating step. It is not a duty to accept a bad fix.

Workflow: quote the steps line, then mark the unless-bar. Next, mark who pays the cost and who proves the gap. Then send the cap to the cap guide.

Upload the same file. Flags come back on that file. A first-pass — a highlighter on the uploaded file, not a decision — can mark the four phrases. A human still fills the checklist.

Not a chat. Not a word-processor add-on. Not a contract-lifecycle archive. Not a lawyer marketplace. Pause if the bar and the cost shift stay untouched. That plan is not a cleared file.