Understanding the Legal Use of a United Kingdom Company Seal for Your Business

Setting up a limited company in the UK involves plenty of steps, from choosing a business structure to ensuring compliance with company law. But one area that often causes confusion for new business owners is the united kingdom seal, sometimes known simply as the “company seal.” What is it, when do you need one, and how does it affect your contracts and documents?

If you’ve just registered your company (or you’re considering it), you might be wondering whether a united kingdom seal is required, when it's legally necessary, and what the risks or benefits are for your business. Don’t stress-you’re not alone! Understanding the practical and legal aspects of using a company seal can help you make informed decisions and avoid avoidable mistakes as your business grows.

In this guide, we’ll demystify the united kingdom seal-explaining exactly what it is, when and why you might need one, and how you can ensure your legal foundations are watertight from day one. Let’s get started!

What Is a United Kingdom Seal (Company Seal)?

First off, let’s clear up what we mean by a united kingdom seal or company seal. Traditionally, a company seal is a device that embosses your business’s official name onto company documents. This creates a mark or “seal” that, in centuries past, signified that the document was formally executed, legally binding, and represented the authentic act of the company.

In the modern UK business world, the use of company seals is largely optional for most standard documents-thanks to changes in the law. However, a united kingdom seal can still play an important role, particularly for certain legal instruments or for businesses operating internationally, where the use of a seal may remain a legal or cultural requirement.

A typical united kingdom seal:

• Embosses the company’s name (and sometimes registration number) onto a document
• Traditionally substitutes for a “wet-ink” signature to show official execution by a company
• Is used primarily on deeds, share certificates, and some international contracts

You can order a united kingdom seal from specialist suppliers, but before you do, it’s crucial to understand if (and when) it’s actually needed for your business activities.

Is Having a United Kingdom Seal a Legal Requirement in the UK?

Here’s the good news for new company directors: Using a united kingdom seal is not a legal requirement for most UK companies under the Companies Act 2006. The law changed in 1989, which means that deeds and most contracts can now be executed using director or officer signatures alone, as long as the proper procedures are followed.

So, in ordinary UK business practice, you can run and grow your company without ever ordering or using a physical seal. Instead, most commercial documents and contracts are now executed by:

• Signature of two directors, or
• A director and the company secretary (if you have one), or
• One director’s signature witnessed by a third party

For more information about what makes a contract legally enforceable in the UK, see our plain-English guide on signed documents and their legal effect.

When Might a United Kingdom Seal Still Be Needed?

Although rarely a strict requirement, there are special circumstances where using a company seal is preferred or even mandatory:

1. Executing Certain Deeds

While most deeds can now be signed without a seal, some banks, government departments, or legal advisors may still request a united kingdom seal for extra formality-especially for property transactions, share transfers, guarantees, or other high-value agreements.

2. International Contracts and Documents

If you’re doing business internationally, some overseas authorities or business partners may expect to see a physical company seal affixed to contracts, powers of attorney, or official correspondence. In some countries, a document without a seal may not be recognised as valid coming from a UK company, so it’s wise to check the requirements of the specific jurisdiction.

3. Share Certificates and Official Notices

Even though the Companies Act 2006 allows for signed certificates, traditional practice (and sometimes Articles of Association) may require the company seal on share certificates or certain corporate resolutions.

4. Company’s Own Articles of Association Require It

Your company may have opted into older or bespoke Articles of Association that specifically require a united kingdom seal for particular actions (such as issuing share certificates). If that’s the case, you must follow your own Articles-so it’s always worth checking them carefully. Not sure what your Articles say? Our Articles of Association Guidance can help you get clear on your obligations.

5. For Show of Professionalism or Tradition

Even where not strictly necessary, some professional firms or long-established companies choose to use their united kingdom seal for tradition, branding, or to add an extra layer of formality to special documents.

How Do I Get a United Kingdom Seal for My Company?

If you’ve decided a seal is right for your business, the process is pretty simple-but you’ll want to get it right from the start.

• Authorise Purchase: Normally, the board of directors should approve the purchase of a company seal. This can be noted by a board resolution.
• Order from a Supplier: Seals can be ordered online. Make sure your full legal company name (as registered with Companies House) is displayed exactly, and consider including your company number for clarity.
• Secure Storage: The company seal is an official tool of your business. Keep it in a secure location with limited access (often with the company secretary or a nominated director).
• Record Use: Maintain a seal usage register to document when and why the seal was applied, who authorised its use, and on what type of document.

If you ever change your Articles of Association or update your registered name, make sure your seal is updated or replaced to reflect the changes-see our guide on updating Articles of Association for more on this.

How Are Documents Properly Executed in the UK?

It’s important to stress that even without a united kingdom seal, you’re still required to validly execute company documents. This means following the right procedures to make your contracts or deeds legally enforceable.

Under the Companies Act 2006, company documents (including deeds and key contracts) can be executed by:

• Affixing the company seal (if you have one), or
• The signatures of two authorised officers (usually directors), or
• The signature of one director, witnessed by an independent adult with their name and address recorded

For deeds (like property agreements), extra caution is needed. Check our comprehensive guide on executing contracts and deeds for a step-by-step breakdown.

What Are the Risks of Not Using a United Kingdom Seal?

For most routine contracts and business paperwork, not having (or not using) a united kingdom seal carries no legal penalty. However, some risks can arise if you:

• Ignore seal requirements written into your Articles of Association
• Overlook the preferences of foreign governments or business partners, leading to delays or invalid contracts abroad
• Apply your seal incorrectly or without authorisation, risking disputes over validity
• Fail to update a seal after a company name change, leading to confusion or rejection of documents

Unfortunately, there’s no “one size fits all” rule-so if you’re not sure, it’s wise to get tailored legal advice before executing important documents, especially those with international implications or relating to property, finance, or share issues.

Best Practices for Using Your United Kingdom Seal

If you do use a united kingdom seal, there are a few steps that can help protect your business and avoid disputes:

• Only allow authorised signatories to use the seal, following procedures set out in company policy or your Articles
• Always keep a seal register, including dates, document types, and names of signatories and witnesses
• For international transactions, double-check local legal requirements before sealing and sending documents abroad
• Review your Articles of Association and update your policies if you introduce a seal

Remember, if you’re ever in doubt about whether a seal is needed-or how to use it correctly-an experienced business lawyer can help you avoid mistakes and ensure your contracts are valid and legally binding.

Are There Alternatives to Using a Company Seal?

Yes-most UK companies choose to rely on signatures from authorised directors as the main way to execute legally binding documents. E-signatures and online contract processes are increasingly accepted under UK law (with some exceptions, especially for documents registered with the Land Registry or HMRC). For more on this, see our article on e-signing business documents.

What Other Legal Documents Should UK Companies Have In Place?

While a united kingdom seal is only needed in special circumstances, there are key legal documents that every UK company should have to protect themselves from day one. These include:

• Staff Employment Contracts - to set clear expectations and protect against disputes
• Shareholders Agreements - to manage risk among founders and investors
• Updated Articles of Association - to clarify share classes, director powers, and procedures
• Privacy Policies - if you collect or process customer data, for GDPR compliance
• A clear set of Service Agreements or T&Cs to manage business relationships with customers and suppliers

Having these professionally drafted is one of the smartest ways to set your business up for long-term success and prevent future problems.

Do I Need to Update My United Kingdom Seal If My Company Name Changes?

Yes! If your company’s name changes (for example, due to a rebrand or ownership change), any existing seals with your old name become invalid from the date of the change. You’ll need to:

• Order a new physical seal with the updated name (and registration number if used)
• Remove and archive the old seal
• Update your Articles of Association or company policy if necessary

For full details about legally changing your company name, see our step-by-step guidance on changing a UK company name.

Key Takeaways

• A united kingdom seal (company seal) is largely optional for modern UK companies, but may still be needed for certain deeds, share certificates, or international contracts.
• Most company documents-including contracts and deeds-can be executed by director signatures alone under the Companies Act 2006, provided the right procedures are followed.
• Check your specific Articles of Association and any international requirements to be sure a seal isn’t mandatory for your company’s needs.
• If you use a united kingdom seal, make sure to authorise its purchase, secure it safely, and keep accurate records of its use.
• Update your seal promptly if your company’s name changes, to avoid document invalidity.
• Always seek tailored legal advice if you’re unsure about executing high-value or cross-border contracts-getting this right can save time, money, and risk long-term.
• Building strong legal foundations with well-drafted agreements and policies (like employment contracts, privacy policies, and shareholders agreements) will help protect your company as it grows.

If you’d like personalised advice about the use of a united kingdom seal, updating your company’s Articles, or preparing legally sound business documents, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat. We’re here to make the legal side simple and set you up for lasting success!