Buying or selling a business in the UK involves more than just agreeing on a price; both parties must prepare and exchange a range of key legal documents to protect their interests and ensure the transaction runs smoothly.
This article explains the key documents required for a business acquisition, highlighting both buyer and seller needs and how they help mitigate risks and clarify responsibilities in the process.
Documents for Both Buyers and Sellers
Heads of Terms
Whether you are buying or selling a business, a Heads of Terms is one of the first documents you will encounter. It sets out the key commercial terms agreed in principle before contracts are drafted, including:
- the price;
- the structure of the deal; and
- the timing.
While often non-binding, the document may include certain binding clauses, such as confidentiality or exclusivity provisions, to ensure negotiations remain confidential and fair.
Confidentiality Agreement (NDA)
A Confidentiality Agreement (Non-Disclosure Agreement or NDA) is essential for both buyers and sellers. It ensures that sensitive business information disclosed during negotiations and throughout the due diligence process, is protected and not misused.
The NDAallows the buyer to receive confidential information about the business whilst restricting how it can be shared and protecting the target business.
Sale Agreement (Share Purchase Agreement or Asset Purchase Agreement)
The main legally binding contract which sets out the terms and conditions of the acquistion, including the transfer ownership of the business, shares or assets. Whether you are buying or selling, this document sets out the legally binding terms including the following key commercial terms:
- the purchase price;
- payment mechanics;
- warranties;
- indemnities;
- completion obligations; and
- Post-completion restrictions and obligations
Completion and Post-Completion Documents
Alongside the sale or purchase agreement there are a number of ancillary documents required to be entered into or provided prior to or on completion. The specific ancillary documents required, we depend on the nature of your specific transaction but can include:
- board minutes;
- shareholder resolutions;
- stock transfer forms;
- share certificates;
- pre-emption waivers;
- updated statutory registers and
- any transitional arrangements to support handover.
Documents Used Only by Sellers
For sellers, there are some specific documents that help facilitate the sale and limit post-sale liability.
Disclosure Letter
The Disclosure Letter is used by sellers to disclose against the warranties set out in the Sale Agreement. This letter helps limit post-sale liability for the sellers by ensuring the buyer is aware of any risks or issues with the business before the sale is completed.
Business Contracts and Records
Sellers are also responsible for providing business contracts, such as:
- customer and supplier contracts;
- leases;
- employment contracts; or
- IP records to the buyer during due diligence.
These documents ensure the buyer understands the ongoing obligations of the business and help avoid potential risks after the purchase.
Documents Used Only by Buyers
For buyers, specific documents are used to assess the business and ensure the deal is right for them.
Due Diligence Documents
Buyers must review a wide range of documents during due diligence to assess the business’ legal, financial, and operational position. These documents typically include:
- financial statements and tax records;
- key commercial contracts;
- employment documentation;
- intellectual property registrations; and
- regulatory approvals and policies.
Completion and Post-Completion Documents
Both parties are responsible for ensuring their respective legal formalities and documentation are in agreed form and/or completed prior to or on completion of the transaction.
Key Takeaways
When buying or selling a business, several key documents are necessary to protect both parties’ interests and ensure a smooth transaction. Professional legal advice is essential to ensure that all documents accurately reflect the deal and comply with UK law.
LegalVision provides ongoing legal support for buying businesses through its fixed-fee legal membership. Their experienced business sale and purchase lawyers help businesses manage contracts, employment law, disputes, intellectual property, and more. Members receive unlimited access to specialist lawyers for a fixed monthly fee. To learn more, call 0808 258 4780 or visit their membership page.
Frequently Asked Questions
1. What should I do if I don’t fully understand the terms in the sale agreement?
It is important to seek professional legal advice if you are unsure about any aspect of the purchase agreement, particularly warranties, indemnities, restrictive covenants, on-going obligations or payment terms. A solicitor can help clarify these provisions and protect your interests.
2. How can I prepare for due diligence when selling my business?
To prepare for due diligence, sellers should ensure that financial records and areas covered in legal due diligence (such as, contracts, leases and intellectual property documents) are organised and up to date. Transparency during this process can help facilitate a smoother sale.


