If you’ve ever been asked for a company seal (sometimes called a common seal), it can feel like you’ve been teleported into an older, more formal era of business.
You might be thinking: Do we really need a stamp to make documents official in New Zealand? Or: Will our contract be invalid if we don’t have a seal?
The good news is that for most modern NZ small businesses, a company seal isn’t something you need day-to-day. But there are still situations where a common seal can be useful (and a few where it might be required by your own internal rules or a counterparty’s process).
This article is general information only and isn’t legal advice. Execution rules can vary depending on the document, your constitution, and the transaction.
Below, we’ll walk you through what a company seal is, whether NZ companies need one, when you might still want to use one, and how to sign business documents properly without a seal.
What Is A Company Seal (Common Seal)?
A company seal (or common seal) is a physical stamp or embossing device that shows the company’s name (and sometimes its NZ company number). Traditionally, it was used to “execute” documents on behalf of the company to show the company had formally approved the document.
Historically, seals mattered because:
- Many companies didn’t have a straightforward way to prove authority to sign.
- Seals were treated as a formal marker that the company (as a separate legal entity) was bound by the document.
- Some documents were expected to be sealed as part of longstanding commercial practice.
These days, the legal and business world has largely shifted toward signatures, clear execution clauses, and documented director approvals (rather than a stamp).
That said, the phrase “company seal” still shows up in templates, legacy policies, and requests from banks or overseas counterparties - so it’s worth knowing where it fits in NZ law.
Do NZ Companies Need A Company Seal?
In most cases, no - NZ companies are generally not required to have a company seal.
Under the Companies Act 1993, companies can generally execute documents without using a seal, provided the document is signed in a way the law recognises (and consistent with the company’s own rules). The Act also contains statutory “assumptions” that can protect third parties dealing with a company in good faith (for example, that internal procedures have been complied with and that officers/directors have the usual authority), which is another reason the seal is far less central than it once was.
So why do some businesses still have one? Usually because:
- They like the extra formality and consistency for certain documents.
- They deal with overseas parties who expect a seal.
- Their own internal governance documents require it (this is the key point).
Check Your Company’s Constitution (It Might Require A Seal)
While NZ law doesn’t generally force you to have a seal, your company’s own constitution might (or it might specify how and when the seal can be used).
If you’re not sure what rules apply to your company’s execution of documents, it’s worth reviewing your Company Constitution. Some constitutions include clauses like:
- Whether the company has a common seal
- Where it’s stored and who controls it
- What approvals are needed before it can be affixed
- Who must witness the seal being applied
If your constitution requires a seal (or sets strict rules for how documents must be executed), you’ll want to follow that - otherwise you risk internal governance issues and disputes about whether the company properly authorised the document. That said, even if there has been an internal breach (for example, the seal was used without the right approval), third parties may still be able to rely on statutory assumptions and “apparent authority” principles in some circumstances - so it’s important to manage seal access and approvals carefully.
If you’re setting up a company or updating your governance documents, you can also consider whether to include a seal clause when you Adopt A Constitution.
When Is A Company Seal Still Useful (Or Requested)?
Even if it’s not legally required, a company seal can still come up in the real world. Here are some common scenarios where someone may ask for it.
1) Overseas Deals And International Counterparties
Some countries and overseas businesses still use company seals routinely, and their internal processes may assume a seal is part of “proper” execution.
This doesn’t automatically mean you must have one, but it does mean you should:
- read the execution clauses carefully
- check whether the other party will accept standard NZ execution methods
- avoid agreeing to a seal requirement you can’t meet (or that conflicts with your constitution)
2) Banks, Finance Providers, And “Old School” Onboarding
Some banks or finance providers have legacy requirements in forms that mention a “common seal.” In practice, they often accept director signatures instead - but if the form is rigid, you may need to clarify what execution method they will accept.
This is particularly common with:
- guarantees and indemnities
- security documents
- account opening packs
3) Deeds And High-Value Documents
People sometimes assume a deed must be sealed. In NZ, that’s not automatically true. What matters is that the document is drafted as a deed and executed in a way that satisfies NZ deed requirements (which can be more formal than a standard agreement).
Whether a seal is needed can depend on how the deed is drafted, who is signing, and any witnessing/attestation requirements in the document itself (as well as what the counterparty will accept). It’s a good idea to get advice if you’re dealing with something like:
- a deed of guarantee
- a deed of settlement
- a deed of variation
- a lease deed (e.g. deed of assignment or surrender)
If you want to get clear on the differences in formality, it can help to understand the difference between a deed and agreement before you sign.
4) Property, Leasing, And Registry-Style Paperwork
Commercial property transactions and certain lease documents can involve very formal signing requirements. Even where a seal isn’t mandatory, the other party may ask for one as part of their “tick the box” process.
In these scenarios, it’s less about the seal itself and more about ensuring the document is executed correctly by the company and appropriately witnessed.
5) Internal Corporate Documents (For Consistency)
Some companies use a common seal simply as an internal control - for example, where a business has multiple directors, many locations, or a lot of high-volume paperwork and wants a consistent “official” process.
But it’s important to treat a seal like a security item. If it can be used to bind the company, you should have clear rules on who can use it and when.
How Can A Company Sign Documents Without A Company Seal?
For most small businesses, the practical question isn’t “Do we have a seal?” - it’s “How do we sign business documents properly so they’re enforceable?”
In NZ, a company can usually sign documents through its authorised people (often directors) using signatures, as long as the execution method matches:
- the Companies Act 1993
- the company’s constitution (if it has one)
- the document’s execution clause
When you’re signing as a company, you should also make sure the signatory has the authority to bind the company. Often, that authority is established through a formal board decision, such as a Directors Resolution.
Common Execution Methods In Practice
While every document should be checked on its own terms, common approaches include:
- Director signature(s): Many agreements are signed by one director, or two directors, depending on the company’s rules and the document’s requirements.
- Director + witness: Some documents (or counterparties) want the director’s signature witnessed for additional formality.
- Attorney or authorised signatory: The company might appoint someone to sign under delegated authority (for example, under an “authority to act” or power of attorney arrangement).
If you want a quick refresher on practical signing mechanics (especially when you’re dealing with counterparties who are very particular about execution blocks), the how to sign a contract guide is a useful starting point.
Who Can Witness A Company Document?
Witnessing requirements can vary depending on the type of document and what the other party requires. When a document does need a witness, you’ll want to be sure the witness is eligible and independent enough to avoid future challenges.
To avoid mistakes here, it’s worth checking who can witness a signature, particularly if the document is high value or likely to be relied on later (for example, if there’s a dispute).
Can We Use Electronic Signing Instead Of A Seal?
In many cases, yes. Electronic signing is widely used in NZ business, and many organisations accept it as standard.
However, don’t assume “electronic” automatically means “valid in every situation.” Some documents still have special requirements (deeds can be a common example), and sometimes a counterparty’s internal policies are stricter than what the law requires.
If witnessing is part of the deal, you’ll also need to consider how it’s done (for example, in-person vs remote), and whether an electronic process is acceptable for that particular document. The rules and practical acceptance can vary, so it helps to understand electronic witnessing of documents before you commit to a signing process.
What’s The Legal Importance Of A Company Seal For Business Documents?
A company seal can still carry practical importance, but it’s not usually what makes a document legally binding in NZ.
Generally, a document becomes enforceable because:
- there is a valid agreement (offer, acceptance, consideration, intention, and certainty)
- the document is correctly executed by the right parties
- the signatories have authority to bind the company (including authority a third party is entitled to rely on)
So, while a seal might provide extra comfort to the other side, it’s usually the authority and execution that matter most.
Risks If You Use A Company Seal Without Proper Controls
If your business decides to keep a company seal, it’s worth treating it like a “company signature device.” Poor control can create real risk. For example:
- Unauthorised use: Someone affixes the seal to a document without director approval.
- Internal disputes: Directors/shareholders later argue about whether the company properly approved the deal.
- Contract uncertainty: The other side may argue the company is bound because the seal was used, while the company argues it was improperly applied (and this can get especially messy if the other side relied on the company’s apparent authority).
This is where governance processes matter. If you’re relying on internal approvals, make sure they’re documented and consistent - particularly if you’re scaling, bringing on investors, or planning to sell the business later.
Common Documents Where Execution Details Matter
Small business owners often run into execution issues on documents like:
- commercial leases and deeds related to leases
- loan documents and guarantees
- supplier or distribution agreements
- share transactions (issuances, transfers, buybacks)
- higher-risk customer contracts (especially where limitations of liability are involved)
As an example, if you’re changing ownership or moving shares between founders/investors, you’ll want the paperwork done properly - the transfer shares process often involves very specific signing and record-keeping steps.
Practical Tips For Small Businesses: Do You Need To Get A Company Seal?
If you’re a typical NZ small business (especially a single-director or family-run company), you can usually operate perfectly well without a company seal.
Here are some practical questions to help you decide whether to get one:
1) Does Your Constitution Require A Company Seal?
If your constitution says you must use one (or sets rules about it), you should follow those rules or consider updating your constitution if it doesn’t fit how you actually operate.
If you’re frequently asked for a common seal, it may be simpler to have one - but only if you also put the right controls around its use.
3) Are You Using The Seal As A Substitute For Good Process?
A seal is not a replacement for:
- proper approvals (e.g. board decisions)
- clear authority to sign
- a correctly drafted execution block
- legal review of high-risk documents
In other words, the seal is a tool - not the legal foundation.
4) Can You Standardise Your Signing Process Instead?
Many businesses get more value from standardising:
- who signs what
- when documents must be witnessed
- how approvals are recorded
- where signed originals (or final PDFs) are stored
That approach often prevents disputes more effectively than simply stamping documents.
Key Takeaways
- Most NZ companies don’t legally need a company seal (common seal) under the Companies Act 1993, and can execute documents through authorised signatures.
- A company seal may still be useful or requested in practice, especially for overseas transactions, bank/finance paperwork, and certain formal documents.
- Your company constitution may require a seal or set rules about how it’s used, so always check your internal governance documents.
- Whether or not you use a seal, the key is making sure documents are properly executed, signed by the right people, and supported by clear authority (often documented with director resolutions).
- If your documents need witnessing (or electronic witnessing), make sure you follow the correct process - signing errors can cause delays, disputes, or enforceability issues later.
- For higher-risk documents (like deeds, finance documents, leases, or share transactions), getting legal advice upfront can save you major headaches down the track.
If you’d like help setting up your company’s signing process, reviewing your constitution, or checking whether a document needs a company seal, you can reach us at 0800 002 184 or team@sprintlaw.co.nz for a free, no-obligations chat.
