Disclosure Letter in Australia: What It Is and When to Use One

If you’re selling your business (or shares in your company), a key document you’ll hear about is the disclosure letter.

It’s a practical tool that reduces risk in a deal. Used well, it helps you be transparent about issues in the business and prevents warranty disputes later. Used poorly, it can undermine your protections or leave you exposed.

In this guide, we’ll explain what a disclosure letter is, when you’ll need one, how it interacts with warranties and indemnities, and a step-by-step approach to preparing and reviewing it. We’ll also flag common pitfalls and the related documents you’ll want around it to complete a smooth transaction.

What Is A Disclosure Letter?

A disclosure letter is a document the seller gives the buyer in a business sale or share sale. It “qualifies” the warranties the seller gives in the sale agreement.

In most transactions, the seller makes a set of promises (warranties) about the business-things like accounts being true and fair, no undisclosed litigation, ownership of assets, and compliance with laws. The disclosure letter lists any exceptions to those promises and points the buyer to the information and documents that reveal those exceptions.

Think of it as a transparency tool. It doesn’t fix an issue, but it makes sure the buyer knows about it before completion. If an issue is fairly disclosed, the buyer usually can’t claim breach of warranty for that particular point later (subject to the sale agreement terms).

When Do Small Businesses Use A Disclosure Letter?

You’ll typically use a disclosure letter when a transaction includes formal warranties-most commonly in:

• Share sales (selling some or all of your company’s shares)
• Asset/business sales (selling the business assets, goodwill and contracts)
• Investment rounds (where founders give warranties to incoming investors)

If you’re selling your enterprise via a Business Sale Agreement or a Share Sale Agreement, expect the buyer (or investor) to request a detailed disclosure process.

Buyers often run due diligence first, then receive the disclosure letter before signing (or between signing and completion, depending on the timetable). Sellers usually prepare the first draft, and both sides’ lawyers refine it so it lines up precisely with the warranty schedule in the deal documents.

How Does A Disclosure Letter Work With Warranties And Indemnities?

Warranties are promises about the state of the business. Indemnities are commitments to compensate the other party for certain losses. The sale agreement sets out both, and the disclosure letter interacts with them in three key ways:

1) Qualifying Warranties

For example, if a warranty says “there is no litigation,” but there’s actually a minor supplier dispute, the disclosure letter should flag the dispute, include the correspondence or court documents, and reference where to find it in the data room. That way, the warranty is effectively “subject to” that disclosed exception.

2) Setting The Standard Of “Fair Disclosure”

Most deals include a “fair disclosure” concept-meaning the disclosure must be specific and detailed enough for a reasonable buyer to understand the nature and scale of the issue. Vague statements (e.g. “there may be disputes from time to time”) don’t usually meet that standard.

3) Clarifying Indemnities Vs Disclosures

Some risks are better managed via a specific indemnity, even if they’re disclosed. For instance, if you know about a tax issue but can’t resolve it before completion, the buyer may require a tax indemnity that sits alongside the disclosure.

How To Prepare A Strong Disclosure Letter (Step-By-Step)

Whether you’re a seller preparing disclosures or a buyer reviewing them, a structured process keeps you on track and reduces surprises later.

Step 1: Align With The Warranty Schedule

Start with the sale agreement’s warranty schedule. The disclosure letter should mirror those headings so it’s easy to see where each exception belongs.

If you’re using a standardised Business Sale Agreement or Share Sale Agreement, ask your lawyer to cross-reference each warranty and confirm whether a disclosure is needed.

Step 2: Build A Clean Data Room

Put your key documents in a well-labelled data room (folders with clear naming and dates). Typical folders include corporate, finance, contracts, IP, employment, property/equipment, regulatory, disputes and insurance.

Link each disclosure to a specific document and folder path. Buyers should be able to click straight through to the evidence. If you’re sharing sensitive information, do this under a robust Non-Disclosure Agreement.

Step 3: Draft General Disclosures (Carefully)

General disclosures usually cover information in the public domain (e.g. company ASIC records), documents the buyer already received in due diligence, and matters fairly apparent from those documents.

Keep general disclosures precise. Overly broad wording can be negotiated away, while overly narrow wording might fail to cover what you intended. The goal is to signpost what’s already visible to the buyer, not to hide behind blanket statements.

Step 4: Draft Specific Disclosures (With Evidence)

Specific disclosures list concrete exceptions to specific warranties. Each disclosure should state the issue clearly and link to the supporting document(s) in the data room.

Short, factual statements work best, for example: “There is an ongoing supplier dispute with ABC Pty Ltd (see documents at Corporate/Disputes/ABC Dispute) involving an amount of $12,500.”

Step 5: Use An Index And Consistent Referencing

Include a document index and keep file names consistent. This makes the letter easier to navigate and reduces arguments about whether something was sufficiently disclosed.

Step 6: Check Materiality, Knowledge And Time Limits

Sale agreements often include concepts like materiality thresholds (only “material” matters need disclosure), knowledge qualifiers (based on who in the business knew or ought reasonably to have known) and claim time limits.

Make sure your disclosures are calibrated to those defined terms. If the agreement defines “Knowledge” to include your CFO and COO, for example, confirm those people have been consulted during the disclosure process.

Step 7: Reconcile With Due Diligence Q&A

If the buyer asked specific questions during due diligence, ensure any relevant issues are captured in the disclosure letter and linked to the underlying documents. Buyers will often argue that Q&A answers form part of fair disclosure; make that link explicit where helpful.

Step 8: Align With Completion Steps

Some disclosed matters require an action before completion-like getting a landlord’s consent or novating a customer contract. Flag these clearly and tie them to the conditions precedent or completion deliverables, which may include a Deed of Novation for key contracts.

Step 9: Final Legal Review

Before finalising, have your legal team run a line-by-line review against the warranty schedule. Buyers and sellers should both sanity-check the “fair disclosure” standard, the accuracy of cross-references and any gaps that could create disputes later.

Common Pitfalls And Practical Tips For Sellers And Buyers

For Sellers

• Don’t assume a data dump is disclosure. Fair disclosure requires clarity. If the buyer can’t reasonably identify the issue from what you’ve provided, it may not be effective.
• Avoid vague language. “There may be claims from time to time” is rarely enough. Spell out the claim, parties, amount and status, then link the supporting documents.
• Keep the letter consistent with the deal. If you’ve negotiated a limitation of liability or a materiality qualifier, ensure your disclosures reflect those definitions and thresholds.
• Update if circumstances change. If something material happens between signing and completion, a supplemental disclosure may be needed; check what the agreement allows and whether it affects the buyer’s termination rights.
• Manage sensitive information properly. Use a strong NDA and restrict access on a need-to-know basis, particularly where customer or employee personal information is involved.

For Buyers

• Audit the disclosures against the warranties. Ask: does each exception clearly tie back to the relevant warranty? If not, ask for clarification or redrafting.
• Test the “fair disclosure” standard. Would a reasonable buyer understand the risk from what’s provided? If important information is missing (amounts, dates, counterparties, status), push for detail or supporting documents.
• Watch for “kitchen sink” general disclosures. Push back on sweeping statements that try to qualify everything with one sentence. Specific issues should be specifically disclosed.
• Tie risk to remedies. Where a disclosure reveals a real exposure (tax, IP, employee claims), consider a tailored indemnity, a price adjustment, a holdback/escrow, or a condition precedent to fix the issue before completion.
• Keep diligence and disclosures aligned. If the disclosure letter references documents, confirm they actually exist in the data room and match the description.

What Legal Documents Sit Alongside A Disclosure Letter?

The disclosure letter doesn’t stand alone-it works within a suite of deal and governance documents. Depending on the transaction, you’ll likely see some or all of the following:

• Business Sale Agreement: The main contract for an asset/business sale, including the warranty schedule and liability limitations. See a typical Business Sale Agreement.
• Share Sale Agreement: Used when selling shares in a company to a buyer or investor, commonly paired with a detailed disclosure letter. See a Share Sale Agreement.
• Legal Due Diligence: Buyers often run a structured review of financials, contracts, IP, HR and compliance, which feeds into the disclosure process. Many teams use a Legal Due Diligence Package to keep this organised.
• Non-Disclosure Agreement (NDA): Protects confidential information you share in the data room and during Q&A. A robust Non-Disclosure Agreement is standard before due diligence begins.
• Deed Of Novation: Used to transfer key customer, supplier or service contracts in an asset sale. Pair disclosed consent requirements with a Deed of Novation as a completion deliverable.
• Shareholders Agreement: For investment rounds, founders and investors often agree on governance, rights and warranties in a Shareholders Agreement, with a disclosure letter qualifying warranties given to investors.
• Company Constitution: Your company’s rules on shares, meetings and director powers can interact with transfer consents and pre-emptive rights, so it’s worth reviewing the Company Constitution early.

In addition, if you’ll be sharing or reviewing any personal information during due diligence, ensure your data handling aligns with your Privacy Policy and Australian privacy laws.

Frequently Asked Questions About Disclosure Letters

Do I Always Need A Disclosure Letter?

Not always. If your sale agreement is very simple and contains minimal or no warranties, a disclosure letter may not be necessary. However, most buyers will ask for warranties in a standard SME sale, which means a disclosure letter is strongly recommended to avoid later disputes.

Who Drafts The Disclosure Letter?

Usually the seller drafts it because they know the business best. The buyer’s lawyer then reviews it to ensure it properly qualifies the warranties and meets the fair disclosure standard in the sale agreement.

What Makes A Disclosure “Fair”?

It’s about clarity and completeness. The disclosure should give enough detail and supporting documents for a reasonable buyer to understand the nature, scope and potential impact of the issue. Vague or scattered references usually won’t cut it.

Can I Update Disclosures After Signing?

Sometimes. It depends on how the sale agreement handles pre-completion disclosures. In some deals, new disclosures let the buyer terminate or renegotiate; in others, they’re accepted if not material. Get advice before updating so you understand the contractual consequences.

What If I Forgot To Disclose Something?

If a material issue wasn’t fairly disclosed and it breaches a warranty, the buyer may have a claim (subject to caps, time limits and other limitations in the agreement). Raise it with your lawyer promptly-there may be a path to manage the issue before completion, or to negotiate a solution.

Key Takeaways

• A disclosure letter is the seller’s tool to qualify warranties in a sale or investment deal by clearly setting out exceptions and linking evidence.
• Use a structured process: mirror the warranty schedule, build a clean data room, draft general and specific disclosures, and keep references consistent.
• “Fair disclosure” is about clarity-short, factual statements with supporting documents help prevent future disputes.
• Sellers should avoid vague language and keep disclosures updated; buyers should test disclosures against warranties and push for detail where needed.
• The disclosure letter sits alongside core documents like the Business Sale Agreement or Share Sale Agreement, with NDAs, novations and governance documents often in the mix.
• Getting legal guidance early keeps the disclosures aligned with liability caps, knowledge definitions and completion steps in your contract.

If you’d like a consultation on preparing or reviewing a disclosure letter for your business sale or investment round, you can reach us at 1800 730 617 or team@sprintlaw.com.au for a free, no-obligations chat.