Who Can Sign Contracts for a Company NZ

If you’re running a company, you’ll sign contracts all the time - customer agreements, supplier terms, leases, NDAs, contractor agreements, software subscriptions, you name it.

But there’s a question that can quietly cause big problems (especially when a deal goes sour): who can sign a contract for a company in New Zealand?

It’s a practical issue, not just a legal “technicality”. If the wrong person signs, you may end up with:

a contract you can’t enforce (or that someone says isn’t binding),
an unexpected commitment your company didn’t actually approve, or
a dispute about whether your company is “stuck” with the deal anyway.

In this guide, we’ll break down how signing authority works under the Companies Act 1993, what “authority” really means in day-to-day business, and the simple steps you can take to protect your company from day one.

Note: This article is general information only and doesn’t take into account your specific circumstances. It isn’t legal advice. If you need help for your situation, get advice from a qualified lawyer.

Why Does It Matter Who Signs A Contract For A Company?

In a company structure, the company is a separate legal person. That means the company (not you personally) enters into contracts, owns assets, and takes on liabilities.

But a company can’t physically sign anything - it acts through real people. So when someone signs an agreement “for” the company, the key question becomes:

Did that person have authority to bind the company?

When authority is clear, everything is easy: the other party knows they have a deal, and you know your company has made a valid commitment.

When authority is unclear, that’s when disputes happen. Common “messy” scenarios include:

A team member signs a supplier agreement because “we needed it urgently”, but the pricing or term is way beyond what you’d approve.
A co-founder signs a contract even though you agreed both founders would approve anything over $10,000.
A “head of” role signs (e.g. Head of Sales), but your board never gave that person signing power.
A landlord asks who can sign and you don’t have a clean answer, delaying your lease signing.

Even if your company later says “we never authorised that”, the other party might still argue the company is bound - for example, because the law can protect people dealing with a company where it was reasonable to rely on what appeared to be proper authority (more on that below).

So the goal is simple: make it easy to prove the right person signed, with the right authority, at the right time.

What Does The Companies Act 1993 Say About Company Contract Authority?

The Companies Act 1993 is the starting point for understanding company signing and contract authority in NZ.

At a practical level, the Act recognises that a company can enter into contracts through people acting on its behalf - commonly directors, but also employees or agents if they have authority. The Act also covers common methods of execution and gives protections to people dealing with companies (including “indoor management” style assumptions) in sections 180–182.

Authority Is The Key Concept (Not Job Titles)

Business owners often assume authority follows titles - “CEO”, “General Manager”, “Operations Lead”. Sometimes that’s true in practice, but legally, the real question is whether the person had:

Actual authority (express or implied), or
Apparent authority (sometimes called “ostensible authority”).

These concepts aren’t just academic - they’re exactly what gets argued about when a contract is challenged.

Actual Authority (Express Or Implied)

Actual authority means the company has actually authorised the person to sign.

This can be:

Express: clearly given (e.g. board resolution, written delegation, authority policy, employment contract terms).
Implied: authority that comes with someone’s role and responsibilities (e.g. a procurement manager being able to place ordinary purchase orders within a normal range).

Implied authority is where many small businesses get caught out - because “normal day-to-day authority” can be fuzzy unless you set rules and limits.

Apparent Authority (What The Other Party Reasonably Thinks)

Apparent authority is about how the situation looks from the outside.

If your company, by its words or conduct, gives someone the appearance of authority (for example, you let them negotiate, use a company email signature, and act as the deal lead), the other party may argue they were entitled to rely on that.

This is also where the Companies Act 1993 can matter in practice: under the statutory assumptions available to people dealing with a company (often discussed as “indoor management” protections), a company may be prevented from denying authority in some circumstances where the other party acted in good faith and the situation appeared regular.

This is why having internal rules alone isn’t always enough. You also want external behaviour to match those rules - otherwise you may still be “stuck” with a contract you didn’t intend to approve.

Execution vs Authority

Another common point of confusion: signing a contract (the physical act of executing it) is not the same thing as having authority to commit the company.

You can have a beautifully signed agreement that still causes problems if the signer didn’t have authority, or if your internal approval process wasn’t followed. On the flip side, even if there was an internal issue, a company can sometimes become bound if (for example) it later ratifies the agreement (expressly or by conduct), or if the other party can rely on statutory assumptions.

It’s also worth remembering that whether an agreement is enforceable depends on the usual contract requirements (offer, acceptance, intention, etc.). If you want a simple refresher on that side of things, What Makes A Contract Legally Binding is a helpful baseline.

So, Who Can Sign A Contract For A Company In Practice?

There isn’t one universal answer for every company - but there are common categories of people who can sign, depending on what authority they’ve been given.

1) Directors

Directors are usually the clearest “default” signatories because they’re responsible for managing (or supervising the management of) the company.

In many small businesses, the director is also the founder and day-to-day operator - so practically, the director signs most things.

Even then, it’s still smart to check:

Does your company have one director or multiple directors?
Do you require joint approval for big decisions?
Do your shareholders expect board decisions before certain commitments are made?

Those rules are often captured in your Company Constitution and/or a shareholders arrangement.

2) A Single Director (If You’re A One-Director Company)

If your company has only one director, it’s usually straightforward: that director can sign contracts on the company’s behalf.

Where one-director companies can still run into trouble is when:

someone else (like a staff member) signs without a clear delegation, or
investors, lenders, or a landlord wants written confirmation of authority.

In those cases, it helps to be able to point to a clear written delegation or a formal approval record.

3) Two Directors (Or A Director And Another Authorised Signatory)

Sometimes companies choose to have two people sign certain documents (especially higher-risk or higher-value ones), even if one signature could legally bind the company.

This is often a governance choice rather than a strict legal requirement - but it can be a great risk-control tool.

Typical examples where businesses like “two signers” include:

commercial leases,
loan documents and guarantees,
large supply agreements,
long-term contracts with automatic renewal.

If you’re signing (or being asked to sign) a lease, it’s worth getting the fine print checked - a Commercial Lease Review can flag hidden risk areas like personal guarantees, ratchet rent reviews, and strict make-good obligations.

4) Employees Or Managers With Delegated Authority

Employees can sign contracts for a company if they have authority to do so.

In small businesses, delegation often happens informally (“you handle suppliers”), but informality is exactly what creates disputes later.

Good delegation is usually:

written (even a short internal authority schedule can help),
limited (e.g. dollar limits, contract term limits, approved vendor lists), and
consistent with how you present that person externally.

If you want a clean, practical way to document that someone can act for the business in a particular situation, an Authority to Act Form can be useful - especially where the other party wants something formal.

5) Agents And Contractors

Your company can also act through agents - for example, a broker, consultant, or contractor - but you want to be extra careful here.

With third parties acting on your behalf, disputes often arise because:

the scope of authority wasn’t clear,
the agent “over-promised” to close a deal, or
there was confusion about whether the agent could sign or only negotiate.

If you use agents, make sure the agreement clearly states whether they can:

introduce leads only,
negotiate terms only, or
sign and bind the company (this should be rare and tightly controlled).

6) Someone Signing Under A Power Of Attorney Or Specific Appointment

In some cases, you might want someone else to sign because the director is overseas, unwell, or unavailable during a transaction.

That’s where a formal appointment (like a power of attorney) may be considered. This area can be technical, so it’s worth getting legal advice to make sure the authority is valid and limited to what you actually intend.

How Do You Prove Someone Has Authority To Sign?

From a risk-management perspective, it’s not enough that you “know internally” who’s allowed to sign.

You also want to be able to prove it quickly if:

a supplier asks for confirmation,
a bank wants governance documents,
a dispute arises later, or
you’re selling the business and a buyer is doing due diligence.

Here are the main ways companies typically evidence authority.

Company Constitution And Governance Documents

Your constitution may include rules about:

how directors make decisions,
whether shareholder approval is required for major transactions, and
any signing requirements or restrictions.

Not every company has a constitution, but if you do, it’s a key document to check (and keep updated). Having a tailored Company Constitution can help avoid “we thought it worked this way” disputes later.

Board Resolutions (And Clear Decision Records)

For higher-value or higher-risk agreements, a written resolution is one of the cleanest ways to show the company approved the deal and authorised a person to sign.

This is particularly useful when:

there are multiple directors,
the contract is outside ordinary day-to-day operations, or
the company expects the other side to rely on the signature without further verification.

Even for small companies, keeping a simple written record is good practice. A Directors Resolution Template can make that process much easier and more consistent.

Delegations Of Authority (Authority Limits)

A delegation of authority policy (sometimes called an “approval matrix”) sets out who can sign what, up to what value, and under what conditions.

For example:

Office Manager: can sign supplier POs up to $2,500
Operations Manager: can sign service agreements up to $10,000 for up to 12 months
Director: signs anything above $10,000 or anything longer than 12 months

This is one of the best tools for fast-moving businesses - because it reduces bottlenecks without giving away the keys to the kingdom.

Signing Blocks And Wording Matters

A simple but powerful tip: make sure the contract shows the person is signing for and on behalf of the company, not in their personal capacity.

A basic signing block often includes:

Company legal name
Signer’s full name
Signer’s position (e.g. Director)
Wording like “for and on behalf of ”

This won’t fix an authority problem on its own, but it reduces confusion and helps show the intent.

Common Traps (And How To Avoid Them) When Someone Signs “For The Company”

Even if you understand the theory, the reality is that contracts get signed when you’re busy - and that’s exactly when mistakes happen.

Here are some of the most common traps we see small businesses run into.

Trap 1: “They’re A Manager, So They Must Be Allowed To Sign”

Job titles don’t automatically create authority. If a dispute happens, you’ll want evidence that the company actually authorised that person (or that it was reasonable for the other party to believe they were authorised, including by relying on statutory assumptions where available).

Fix: have a simple internal approval matrix and make sure external communications align with it.

Trap 2: Co-Founders Aren’t Aligned On Who Approves What

This is common in early-stage businesses. One founder signs quickly to close deals, while the other expects consultation first.

This can create internal conflict and external legal risk.

Fix: put decision-making rules in writing early (including signing authority). This is often covered alongside share ownership and governance in a Shareholders Agreement.

Trap 3: Signing An NDA Or “Simple” Document Without Thinking

NDAs feel routine, but they can include:

one-way confidentiality obligations,
non-solicitation clauses,
IP assignment wording, or
unexpected liability provisions.

And if the wrong person signs, you can end up arguing about whether your company is bound to keep information confidential (or whether you can enforce confidentiality against the other side).

Fix: centralise signing for sensitive documents, or use a lawyer-drafted Non-Disclosure Agreement that matches how your business actually operates.

Trap 4: “We Approved It Verbally” (But Can’t Prove It)

You might have absolutely approved the deal - but if there’s no record, it becomes a credibility contest later. And if an unauthorised contract is signed, you may be forced into arguments about whether the company later ratified it, or whether the other party can rely on statutory protections.

Fix: keep quick written records (even short resolutions or emails confirming approval), especially for major contracts.

Trap 5: Not Checking The Other Side’s Authority

This article is about protecting your company - but don’t forget the reverse risk.

If you sign a contract with another company, and their junior staff member signs without authority, you could end up with a dispute about enforceability.

Fix: for higher-value deals, ask who is authorised to sign and request evidence (like a director sign-off or written authority).

Key Takeaways

Authority is the core issue. In New Zealand, companies enter contracts through people acting on their behalf, but you want clear authority so the agreement can’t be easily challenged.
Directors commonly sign - but employees, managers, and agents can also sign if they’ve been properly authorised (and you can prove it).
Statutory protections can matter. Under the Companies Act 1993 (including sections 180–182), people dealing with a company may be able to rely on certain assumptions, and companies can also sometimes become bound by later ratification.
Use practical evidence tools like a constitution, written delegations, and director/board resolutions to show who can sign and under what limits.
Reduce risk with good process: consistent signing blocks, internal approval limits, and a habit of keeping short written approval records.
Don’t leave it to guesswork - getting your legal foundations right early can save major cost and stress later, especially as you grow and sign bigger deals.

If you’d like help setting up signing authority, reviewing a contract before it’s signed, or tightening up your company governance, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.

Who Has Authority to Sign Company Contracts in New Zealand?