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The T&Cs mistake that quietly voids your protection

Terms only bind the other side if they were in front of them before the deal was struck. Put them on the invoice and you have no liability cap when you need one.

The client is refusing half the invoice and threatening to claim for a delay. You reach for the liability cap in the terms you paid good money for — and they say they never agreed to them. If those terms were not in front of the client before the deal was struck, they are probably right, and your cap, your payment terms and your intellectual property clause are all missing at the exact moment you need them.

Here is the sting: it has nothing to do with the drafting. The words are usually fine. They just never became part of the contract.

The mistake, in one sentence

Terms bind the other side only if they were incorporated before the contract was formed. Brilliant clauses on page four of an invoice sent after the job was agreed are, legally, just words on a page. Incorporation — not clever drafting — is what makes terms enforceable, and it is the step almost everyone skips.

Why the invoice is too late

A contract forms on offer, acceptance, consideration and an intention to create legal relations. The moment the other side accepts, the contract exists and its terms are fixed. Anything bolted on afterwards — on the invoice, in a follow-up email, on a delivery note, in the small print of a portal they log into later — is a proposed variation they are free to ignore. You cannot retrofit protection onto a deal already struck.

The fix is a move, not a rewrite: take the same terms and put them into the quote, the order form and the order confirmation. If you make one change after reading this, make it that one.

In practice · illustrative example

Made-up figures, not a real matter. A design studio agrees a £6,000 brand project over email and starts work. Its terms — capping liability at the fees paid, and charging late-payment interest — appear for the first time on the final invoice. The client disputes part of the fee and threatens to claim for a delay. Because the terms arrived after the deal was struck, the studio cannot lean on its cap, and the interest clause is far harder to run. The same terms linked in the original proposal and accepted with the go-ahead email would have held.

Onerous clauses have to be pointed at

There is a second trap inside the first. A clause that is particularly harsh or unexpected has to be fairly and reasonably brought to the other side's attention — a wide exclusion of liability, a surprise automatic renewal, a steep cancellation charge, an indemnity sitting outside the cap. Bury it in standard small print and a court may decide it was never incorporated at all. The old shorthand is that the more unusual the clause, the bigger the red hand pointing at it has to be. The fix is presentational as much as legal: ordinary sized type, visible on the order page, flagged at the point of order.

Battle of the forms: whose terms win

In business deals both sides push their own paperwork. As a general rule the last shot wins — the last set of terms sent, and not objected to, before performance begins. So if a customer sends a purchase order carrying their terms after your quote and you simply start work, their payment dates and their liability position may govern instead of yours.

Two practical moves. Send your terms with the quote and again with the order acknowledgement. And read whatever the other side sends back before anyone in your business starts work on it — beginning delivery straight after receiving their terms is how businesses accept them without meaning to.

Course of dealing is a weak Plan A

With repeat customers, terms can sometimes be incorporated by a consistent course of dealing: trade on the same written terms, presented the same way, often enough and a court may accept the customer knew and accepted them. It is a real principle and a poor plan. It only works where the pattern is genuinely consistent, and it is exactly the point the other side will attack when real money is on the line. Capture a positive acceptance at the start of the relationship instead, and reference your terms on every order after that.

Getting them in is not the end of it

Incorporation gets your terms into the contract; it does not guarantee every clause survives. In consumer contracts the Consumer Rights Act 2015 requires terms to be fair and transparent, and an unfair term is not binding on the consumer. In business deals, clauses excluding or limiting liability are read narrowly and have to be reasonable to stand up — and you cannot exclude liability for death or personal injury caused by negligence at all.

Which is why boring beats maximalist. A cap you can rely on is worth more than a bigger one you cannot.

The five-minute check to run today

Pull up your last three signed deals and ask one question of each: can you point to the moment the customer accepted your terms, before the work began? A tick-box, a signature, or an email saying “agreed to your terms dated X” all count. “It's on the invoice” and “they're on the website somewhere” do not.

If the honest answer is no on all three, you have a gap worth closing before the next dispute rather than after it.

What to do next

A terms and conditions package starts at £695 +VAT and covers one set of terms for one customer type: payment terms including late-payment interest, liability and limitation clauses drafted to be enforceable rather than merely aggressive, ownership of intellectual property, and website, e-commerce or SaaS terms where you sell online. It comes with a note on how to make them apply — the part that fails most often. Selling to consumers as well as businesses needs a second set, quoted separately.

If your terms are fine and only the mechanics are wrong, say so: reviewing how terms are presented and accepted is a smaller job, with scope and fee agreed in writing before anything starts. Book a legal review and bring your quote template and your last signed order. This is general legal information, not advice on your contracts.

Related

Start with our guide to business contracts for what makes an agreement binding, and website terms and privacy for the documents your site needs. To pressure-test a single agreement, run the free contract risk checker.

Legal information, not advice

This is general legal information, not advice on your situation, and nothing here is wording you can drop into your own terms. For advice tailored to your business, book a legal review. Buzz Legal Ltd is not a firm of solicitors and is not regulated by the SRA; it provides non-reserved business legal support, and reserved legal activities are carried out by RHF Solicitors, authorised and regulated by the Solicitors Regulation Authority (no. 324115).

On this page The mistake, in one sentence Why the invoice is too late Onerous clauses Battle of the forms Course of dealing Getting them in is not the end The five-minute check What to do next

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Common questions

Do my terms count if they are only on my website?

Only if the customer was pointed to them before ordering and had a real chance to read them. A terms link in the footer that nothing in the order process mentions is easy for the other side to say they never agreed to — and if the terms were not incorporated before the contract was formed, they are not part of it. That means your liability cap, your payment terms and your intellectual property clause are all missing at the exact moment you need them. Reference the terms in the quote and on the order form, and capture a tick-box or a signature.

Can I just add my terms to the invoice?

You can print them there, but by then it is usually too late. If the deal was agreed at quote or order stage, the contract already exists, and terms arriving with the invoice are a proposed variation the other side can simply ignore. This is the single most common way businesses void their own protection: good terms, sent at the wrong moment, by a business that believes it is covered. Move them upstream — into the quote, the order form and the order confirmation — so they are in front of the customer before acceptance rather than after it.

Whose terms win if we both have our own?

As a general rule in business deals, the last set of terms sent and not objected to before performance begins tends to govern — the battle of the forms, decided on the last shot. It is highly fact-sensitive and turns on the exact sequence of documents, which is why the paperwork trail matters more than most people expect. Two practical moves: send your terms with the quote and again with the order acknowledgement, and read whatever the other side sends back before anyone in your business starts work on it.

Can something my salesperson said override the written terms?

It can. A clear promise made before the deal — “don't worry, we'll cover that” — can become a term of the contract, or a misrepresentation entitling the other side to a remedy, cutting straight across what your written terms say. An entire agreement clause helps and a non-reliance clause helps more, but neither is a licence for the sales team to say whatever closes the deal. The real fix is alignment: what your people promise and what your documents say should describe the same product.

Do consumer sales need different terms?

Yes, and using your business-to-business terms on a consumer is a good way to end up with no enforceable terms at all. Consumers have statutory rights under the Consumer Rights Act 2015 that cannot be excluded, unfair terms are not binding on them, and distance and off-premises sales carry a 14-day cancellation right under the Consumer Contracts Regulations 2013 along with a list of pre-contract information you must give before the sale. If you sell to both, you need two sets of terms and a reliable way of telling which applies at the point of order.

Get legal sorted before it bites.

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