You send your quote with your terms and conditions attached. The other side sends back a purchase order with their terms and conditions. You start work (or ship the goods), they pay the invoice… and nobody thinks twice.
Until something goes wrong.
Suddenly, both of you are pointing at different terms: your late payment clause, their limitation of liability clause, your warranty wording, their “no returns” policy. This is what lawyers call the battle of the forms, and it’s one of the most common (and avoidable) causes of commercial disputes for New Zealand businesses.
This 2026 update reflects the way modern businesses actually contract today - fast-moving supply chains, email acceptance, online portals, and automated purchase orders - where it’s easy to “agree” to something without ever having a single signed contract.
The “battle of the forms” happens when two businesses are trying to contract with each other, but each one is relying on its own set of standard terms and conditions (T&Cs).
It’s especially common in B2B transactions where both sides have:
- their own quote templates
- their own purchase order terms
- their own invoice terms
- “we only supply on our terms” wording
In practice, the contract forms bounce back and forth like this:
- Seller sends a quote with Seller T&Cs
- Buyer issues a purchase order (PO) with Buyer T&Cs
- Seller delivers goods/services and sends an invoice with Seller T&Cs again
- Buyer pays (sometimes with remittance advice that references Buyer T&Cs)
Everyone moves on - because the commercial relationship matters, the deadline matters, and it feels awkward to “make it legal”. But legally, the key question is:
Which terms actually apply?
Why It’s Such A Big Deal
Most “standard terms” are designed to protect the business that drafted them. So the outcome of the battle can decide:
- who pays if the product is defective
- what warranties apply (and for how long)
- whether a party can exclude or cap liability
- what happens if there’s a delay
- how disputes must be handled (courts, arbitration, jurisdiction)
- when and how either party can terminate
And when there’s no clear winner? You can end up with uncertainty, extra cost, and a dispute that’s far harder to resolve than it should be.
How Do NZ Courts Decide Which T&Cs Win?
New Zealand contract law generally looks at offer and acceptance. In a battle of the forms scenario, each exchange of documents may be treated as:
- an offer
- a counteroffer
- an acceptance (sometimes by conduct)
That means the “winning” terms are often the terms in the document that is treated as the final accepted offer - which is why you’ll sometimes hear the shorthand “last shot wins”.
But it’s not always that simple. The result depends on what was actually communicated and how the parties behaved.
Acceptance Can Happen By Conduct
One of the biggest traps is thinking you need a signature for a contract to exist. In many business-to-business relationships, the contract is formed because the parties act like there is one.
For example:
- The buyer issues a PO on their terms.
- The supplier delivers anyway.
- The buyer accepts delivery and uses the goods.
Even if nobody signs anything, the law may treat the supplier as having accepted the buyer’s “offer” (including the buyer’s terms) by performing.
That’s why, if you’re starting supply before terms are clearly agreed, you’re taking a real risk.
“Subject To Our Terms” Wording Isn’t A Magic Shield
A common line in quotes and invoices is:
“All work is supplied strictly on our terms and conditions.”
This can help, but it doesn’t automatically win the battle. If the other party clearly rejects your terms and insists on theirs - and you proceed anyway - you may have accepted the counteroffer.
Sometimes The Outcome Is “No Clear Set Of T&Cs”
If the back-and-forth is messy enough, a court may find there is a contract but that the conflicting terms don’t form part of it. In that scenario, you might be left relying on:
- the core agreed points (price, quantity, delivery date, scope)
- implied terms under New Zealand law
- general contract principles
This can be uncomfortable, because implied legal terms may be very different to what either party expected (especially around liability and remedies).
Common “Battle” Clauses That Cause Real Disputes
Not all terms matter equally. In our experience, disputes usually flare up around a handful of clauses that affect money, risk, and leverage.
1) Limitation Of Liability And Indemnities
Your terms might cap liability to (say) the contract price. Their terms might say you’re liable for all losses, including indirect loss, lost profits, or third-party claims.
If your business provides services, it’s also common to use a tailored Limitation Of Liability clause to keep your risk commercially sensible.
The problem is, if you assume your cap applies (but theirs actually wins), you might be carrying far more exposure than you priced for.
2) Payment Terms, Interest, And Debt Recovery
Late payment provisions often differ wildly. For example, your terms might include:
- 7-day or 14-day payment terms
- interest on overdue invoices
- debt recovery costs
- the right to suspend supply for non-payment
But the buyer’s terms might allow them to withhold payment if there’s a “dispute”, even a minor one - which can be a major cashflow issue for a small business.
3) Warranties, Returns, And “No Refunds” Statements
If you supply goods or services in New Zealand, you also need to make sure your T&Cs don’t create compliance problems under consumer laws like the Fair Trading Act 1986 and (where it applies) the Consumer Guarantees Act 1993.
Even in a B2B relationship, misleading “no refunds ever” wording can cause trouble if it’s used in a context where consumers are involved, or if it misrepresents legal rights.
It’s worth getting your terms reviewed to make sure they’re commercially strong and legally compliant, not just “tough-sounding”.
4) Scope, Variations, And Change Requests
Scope creep disputes are common when the only “contract” is a quote plus a PO. You might think you’re doing extra work on a time-and-materials basis, while the other side thinks it’s included in a fixed price.
Good contracts usually set out:
- what’s included in the original scope
- how variations must be requested/approved
- how pricing changes are calculated
- what happens if timelines shift
This is often better handled in a proper Service Agreement (or a master agreement plus statements of work), rather than relying on whichever PDF was sent last.
5) Dispute Resolution And Jurisdiction
If you deal with offshore suppliers or customers, the “battle” can determine:
- which country’s law applies
- where disputes must be heard
- whether arbitration is mandatory
Even within New Zealand, your terms might specify a particular forum or process that affects cost and speed of resolution.
The good news is you don’t need to accept battles as “just part of doing business”. Most of the time, you can prevent the problem with a few practical habits and better contract design.
1) Use One Master Agreement Before Trading Starts
If you have repeat customers or suppliers, a master agreement is usually the cleanest solution. It creates a single set of terms that apply to all future orders, quotes, and invoices.
For example, you might agree a master services agreement that says:
- the master agreement prevails over any PO terms
- any change must be agreed in writing by authorised people
- quotes are valid offers only when accepted under the master agreement
This can save you a lot of back-and-forth and puts you in control of risk from day one.
2) Build A Clear “Order Of Precedence” Clause
An “order of precedence” clause is a simple but powerful tool. It says which document wins if there’s an inconsistency.
For example (in plain English):
- The signed agreement wins first
- Then the statement of work / quote
- Then your standard terms
- And any buyer PO terms are excluded unless expressly agreed
It won’t fix every scenario (especially if the other party never agreed to your terms), but it can reduce ambiguity when documents pile up.
3) Don’t Start Work If The Other Side Has Rejected Your Terms
This is the hardest one commercially, but it’s often the most important.
If the buyer sends a PO that says something like:
“Supplier accepts these terms by supplying the goods.”
…and you supply without objecting, you may have accepted those terms.
If you genuinely can’t accept the PO terms, you should respond clearly (and promptly) before you perform. For example:
- Confirm you reject the PO terms.
- Confirm supply is only on your terms (attach them again).
- Ask for written confirmation that they accept your terms, or propose a negotiated middle ground.
This is also where having well-drafted business terms can make negotiation easier, because you’re not trying to argue clause-by-clause from scratch. Many businesses formalise this via Business Terms that are consistent across sales documents.
4) Make Acceptance Rules Obvious On Your Quote
Your quote is often the document that sets the “offer”. If you want your terms to apply, make it clear how the other party accepts it.
For example, you can state that acceptance occurs only when:
- they sign and return the quote, or
- they email explicit acceptance of the quote and your terms, or
- they pay a deposit (if you use deposit-based acceptance)
Then, if they try to “accept” by sending a PO on different terms, you have a stronger argument that it’s a counteroffer (not an acceptance) - and you can respond accordingly.
5) Align Your Sales Process With Your Legal Position
A lot of battle-of-the-forms risk is created by operational habits, not bad intentions. A few process tweaks can make a big difference, like:
- Training staff not to accept POs with conflicting terms without escalation
- Using a standard email response template when PO terms conflict
- Ensuring your terms are attached/linked consistently at quote stage (not just invoicing stage)
- Keeping a clean paper trail (quotes, acceptance emails, delivery confirmations)
If your business is growing, these systems also help you scale without disputes increasing in proportion to your revenue.
If a dispute has already started, it can be tempting to focus purely on “who is right”. But practically, you’ll usually get better outcomes by stepping back and working out two things:
- What contract was formed (if any), and when?
- What evidence shows which terms were communicated and accepted?
In real life, your evidence might include:
- the original quote and attachments
- the buyer’s PO and attached terms
- emails discussing scope, pricing, delivery, lead times, or risk
- invoice terms
- portal screenshots (where orders are placed online)
- patterns of previous dealing between the parties
Be Careful About “Fixing It” With A New Invoice Term
Some businesses try to solve the issue by putting stronger terms on the invoice.
That can be helpful for future transactions, but it doesn’t always fix the legal position for an order that was already accepted and performed under earlier documents. In many cases, the contract was formed before the invoice was even issued.
Don’t Forget The Wider Legal Framework
Even where your contract terms are unclear, you may still have rights and obligations under other laws, depending on the situation. For example:
- If statements were inaccurate or misleading, the Fair Trading Act 1986 may be relevant.
- If personal information was involved (for example, customer delivery details), you may also need to think about the Privacy Act 2020 and having a fit-for-purpose Privacy Policy.
- If the relationship is ongoing and you’re changing the commercial arrangement, a properly documented Contract Change process can prevent the dispute from repeating.
This is also where tailored legal advice matters. Two disputes can look the same on the surface, but the contract formation timeline (and the evidence) can completely change the outcome.
Key Takeaways
- The “battle of the forms” happens when both parties try to contract on their own standard T&Cs (quotes, POs, invoices), and the documents don’t match.
- In New Zealand, the outcome often turns on offer and acceptance, including acceptance by conduct - meaning you can “agree” to the other side’s terms by simply performing.
- The most common flashpoints are limitation of liability, warranties/returns, payment terms, scope variations, and dispute resolution clauses.
- You can avoid most battles by using a master agreement, adding a clear order of precedence clause, and tightening your internal process for dealing with buyer PO terms.
- Trying to “fix” terms at invoice stage may be too late if the contract was already formed earlier in the transaction.
- Strong, consistent, legally compliant business terms and a proper contract structure protect your cashflow and risk profile from day one.
If you’d like help tightening up your terms and conditions, negotiating a clean master agreement, or resolving a “battle of the forms” dispute, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
