Authorised Signatory: Who Can Sign Contracts and How to Appoint One

If the wrong person signs a contract for your business, you can end up arguing about whether the deal is binding, whether payment is due, or whether you can back out. That problem shows up more often than founders expect, especially when a fast-growing team lets managers sign supplier terms, a director signs without checking the company constitution, or a sales employee accepts a variation over email that no one approved internally.

An authorised signatory is the person your business has properly empowered to sign contracts and other important documents on its behalf. The practical issue is not just who has seniority. It is whether they actually have authority, whether that authority is documented clearly, and whether the contract itself has been signed in a way that will stand up if there is a dispute later.

This guide explains what an authorised signatory means for New Zealand businesses, who can usually sign, how to appoint someone properly, and the legal issues to check before you sign a contract, deed, guarantee or variation.

Overview

An authorised signatory is someone with actual authority to bind a business to a legal document. For New Zealand companies, that authority often comes from the Companies Act 1993, the company constitution, a board resolution, delegated authority policy, or the person’s role and conduct within the business.

The safest approach is to match the type of document with the right authority, then record that authority clearly before anyone signs. This matters most before you sign a high-value supplier agreement, finance document, commercial lease, software contract, or any document described as a deed or guarantee.

• Check who legally owns the business and whether it is a company, partnership, trust or sole trader structure.
• Review your constitution, shareholder agreement, board resolutions and delegated authority rules.
• Confirm whether the document needs one signatory, two directors, or a witness.
• Make sure the person signing has actual authority, not just a job title that sounds senior.
• Record the appointment in writing, including limits on value, contract type and approval steps.
• Check whether the document is a contract, deed, guarantee, variation or side letter, because signing requirements can differ.
• Keep signed copies, approval records and email instructions together in one place.

What Authorised Signatory Means For New Zealand Businesses

An authorised signatory is the person your business has permitted to enter legal obligations on its behalf. The key question is whether the business has actually given that person authority to bind it, not whether they simply work there or deal with the other party.

Who can be an authorised signatory?

That depends on the business structure and the document involved.

For a company, authority often sits with the board, directors, or a person the board has validly authorised. In a smaller owner-managed company, a sole director may sign many contracts personally on behalf of the company. In a larger business, authority is usually delegated to roles such as a CEO, operations manager, procurement lead or finance manager, but only within set limits.

For a sole trader, the business and the individual are legally the same person, so the owner usually signs personally. For a partnership, the partnership agreement matters, because one partner may have authority to bind the firm in some circumstances, but internal limits can still be relevant. If a trust carries on the business, the trustees or a corporate trustee will usually need to sign according to the trust deed and any company rules.

Actual authority and apparent authority

Actual authority is authority the business has really given. It may be express, such as a board resolution authorising a named person to sign all supplier contracts up to a dollar limit. It may also be implied from the person’s role, where the role naturally includes making certain business commitments.

Apparent authority is different. This arises when the business presents someone as having authority, and the other party reasonably relies on that appearance. For example, if your business lets a commercial manager negotiate and sign contracts for months without objection, a supplier may later argue that the manager appeared authorised even if your internal policy said otherwise.

This is where founders often get caught. Internal rules help, but they do not always protect you if your external conduct suggests the person could sign.

How companies usually execute documents in New Zealand

New Zealand companies can enter ordinary contracts in several ways, depending on the terms of the contract and the company’s authority arrangements. Many day-to-day agreements are formed by one authorised person signing, by acceptance over email, or even by conduct, such as placing an order under quoted terms.

Deeds and certain formal documents can require more care. The company constitution, the wording of the document, lender requirements, lease requirements or other legal formalities may affect how execution should happen. If a document says it must be signed by two directors, a director and witness, or by a person holding specific authority, that drafting needs to be followed carefully.

Electronic signing is commonly used in New Zealand, but it should still satisfy the contract’s own signing requirements and any legal requirements for reliability, consent and record keeping. Before you accept the provider’s standard terms through an online portal, check whether that click-wrap process will bind the company and whether the account holder is authorised to do it.

How to appoint an authorised signatory

The cleanest way to appoint an authorised signatory is through a written decision by the people who already hold authority. For a company, that usually means a board resolution or a delegated authority document approved by the board.

A good appointment record should set out:

• the full legal name of the business
• the full name and role of the authorised signatory
• the types of documents they may sign
• any dollar thresholds or business limits
• whether a second approval is needed for certain contracts
• the start date and any end date
• whether they can sign electronically
• whether they can approve amendments, renewals or terminations

If your business already has a constitution, shareholder agreement or governance policy, the appointment should be consistent with those documents. If there is any conflict, sort that out first. A board resolution that cuts across the constitution can create exactly the uncertainty you were trying to avoid.

What documents often need signatory attention?

Founders often think about authorised signatories only for major transactions, but the issue comes up across everyday operations.

• customer contracts and master services agreements
• software subscription and SaaS provider agreements
• supplier and reseller terms
• commercial leases and lease variations
• loan documents, guarantees and security documents
• NDAs, side letters and settlement terms
• employment agreements for senior hires
• procurement terms accepted through online portals

If your business is in software, IT or ecommerce, the risk is often hidden in renewals, auto-acceptance of standard terms, or staff clicking through platform contracts without legal review.

Legal Issues To Check Before You Sign

Before you sign a contract, you need to confirm both authority and process. A valid commercial deal can still become messy if the signatory lacked authority, the signing block is wrong, or the document was changed after approval.

1. Does the signer have authority for this specific document?

Authority is rarely unlimited. A founder may authorise a manager to sign customer order forms, but not a long-term exclusivity deal. A finance lead may be able to approve ordinary spend, but not a personal guarantee attached to a finance agreement.

Check:

• the type of document
• the contract value and risk profile
• whether it contains unusual clauses, such as indemnities, exclusivity, auto-renewal, liability clauses, restraint terms or guarantees
• whether internal approval from the board, shareholders, trustees or another sign-off person is required

2. What do your governing documents say?

Your internal documents can change who is allowed to sign and how.

For a company, review the constitution, any shareholder agreement, board minutes and delegated authority policy. For a trust, review the trust deed and any trustee resolutions. For a partnership, review the partnership agreement. If the business recently changed structure, make sure old signatory practices have not carried over by habit.

This matters before you sign because many disputes start with assumptions such as, “she always signs those,” or “we have never needed board approval before.”

3. Is the document a deed, guarantee or finance instrument?

These documents often deserve a higher level of checking. Guarantees can expose directors or related entities to risk beyond the trading business. Deeds can have execution requirements different from ordinary contracts. Finance documents may include certificates, security interests or undertakings that should not be signed casually.

Before you rely on a verbal promise that “it is just standard paperwork”, read the execution clauses and approval conditions carefully.

4. Are you signing personally or for the company?

The signature block needs to be clear. If a director signs in a personal capacity by mistake, or signs a guarantee without noticing it, they may take on personal liability. The same issue can arise when founders use short-form online contracts or scanned signature pages without reviewing the surrounding text.

Check whether the document names:

• the correct legal entity
• the correct New Zealand company number, if relevant
• the signatory’s office, such as director or authorised signatory
• any separate personal obligations, including guarantees or indemnities

5. Has the final version actually been approved?

Businesses often approve one draft and sign another. A supplier may slip in a longer term, a wider liability clause or an overseas governing law clause just before signature.

Use a simple process so the final execution copy is the same version approved internally. This can be as basic as requiring one person to issue the final PDF and one person to confirm no changes were made after approval.

6. Are electronic signatures acceptable here?

Electronic signatures are common and often effective, but they still need to be used properly. Check the contract wording, any platform rules, and whether the other party insists on a wet-ink signature or witness.

Also check who controls the e-signing account. If several staff share one signing login, it can become hard to prove who accepted the document and whether they had authority.

7. What records will you keep if there is a dispute?

If authority is questioned later, your records become crucial. Keep the signed contract, the approval email or resolution, any delegated authority document, and the final negotiated draft together.

A practical file should include:

• the signed version
• the execution version that was approved internally
• board or manager approval records
• the relevant authority policy or resolution
• email correspondence confirming acceptance
• any witness details or e-sign audit trail

Common Mistakes With Authorised Signatory

The biggest mistake is assuming that operational control equals legal authority. Many contract problems come from rushed signing, unclear internal limits, and poor document handling rather than from unusual legal rules.

Letting titles do all the work

A job title like “Head of Sales” or “Operations Director” may sound like enough, but title alone does not always give authority to bind the business to every kind of agreement. This is especially risky with enterprise software deals, reseller arrangements and long-term service agreements.

If someone regularly signs, formalise it. Do not rely on workplace custom alone.

No written delegation

Some founder-led businesses rely on verbal instructions such as “just sign anything under $20,000”. That may work until a dispute arises over whether the amount was exceeded, whether the contract included a renewal, or whether the staff member was allowed to amend legal terms.

A short written delegation is far better than an informal understanding.

Forgetting that renewals and variations can also bind you

Authority problems do not only happen on day one. A person who could sign the initial agreement may not be authorised to extend the term, change pricing, waive a breach or approve a new statement of work.

For subscription businesses and ecommerce operators, this often happens through email replies, procurement portals or account dashboards.

Signing before internal approvals are complete

Pressure from a customer or supplier can push teams to sign first and ask questions later. That creates risk if the board needed to approve the contract, if a shareholder consent was required, or if the contract breaches banking covenants or internal spending limits.

Before you spend money on setup or begin performance under the contract, make sure the internal sign-off path is complete.

Using the wrong entity name

Founders with multiple companies often sign under the trading brand instead of the correct legal entity. If your group has separate IP, staffing and operating entities, this can create confusion about who owes payment, who owns rights and who carries liability.

Use the full legal name each time. If the trading name is included, it should sit under the correct legal entity, not replace it.

Ignoring constitution or shareholder restrictions

Some companies have extra signing or approval rules in their constitution or shareholder agreement. A director may believe they can sign alone because that is how things worked previously, but the documents may require something different for major transactions.

This is common after investment rounds, group restructures or changes in governance.

Not training staff who accept standard terms online

In IT and ecommerce businesses, risk often enters through online purchasing. A team member sets up a new platform, clicks “I agree”, and locks the business into overseas terms, automatic renewals, broad data-use permissions or expensive minimum commitments.

Staff do not need legal training on every clause, but they do need clear rules about:

• who can accept standard terms
• which contracts must be escalated
• what dollar limits apply
• what clauses need legal review, such as privacy, IP ownership, liability and termination rights

Assuming a witness fixes an authority problem

A witness can help prove that a signature is genuine, but a witness does not create authority where none existed. If the signer was not authorised, witnessing the signature does not solve the underlying issue.

The real fix is proper authority plus proper execution.

FAQs

Can one director sign a contract for a New Zealand company?

Often yes, but it depends on the contract, the company’s constitution, any board delegation, and the way the document is drafted. Ordinary trading contracts may be signed by one authorised person, but some documents require stricter execution steps.

Do I need a board resolution to appoint an authorised signatory?

Not in every case, but a board resolution is usually the clearest and safest approach for a company. It creates a written record of who can sign, what they can sign, and any limits that apply.

Can an employee be an authorised signatory?

Yes. A company can authorise an employee to sign certain contracts or categories of documents. The authority should be recorded in writing and matched to the employee’s role and approval limits.

Is an electronically signed contract valid in New Zealand?

Electronic signatures are commonly valid, provided the method used is reliable for the purpose, the parties accept that method, and any specific execution requirements are met. You still need to confirm that the person using the e-signature has authority to bind the business.

What happens if the wrong person signs?

The result depends on the facts. The business may still be bound if the signer had apparent authority or if the business later acts as though the contract is valid. In other cases, the contract may be challenged, which can lead to cost, delay and commercial fallout.

Key Takeaways

• An authorised signatory is someone who has real authority to bind your business to a contract or other legal document.
• For New Zealand businesses, authority may come from legislation, your constitution, a board resolution, a delegated authority policy, or the person’s role and conduct.
• Before you sign, check the business structure, the governing documents, the type of document, the signature block and any approval requirements.
• Do not assume that a senior title, a witness, or past practice automatically makes a signature valid.
• Use written appointments and clear internal signing rules, especially for software, IT and ecommerce contracts accepted online.
• Keep a proper record of approvals, signed copies and execution versions so you can prove authority later if needed.

If you want help with contract review, board resolutions, delegated authority rules, and execution requirements, you can reach us on 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.