Warranty and indemnity in a business sale: which documents to gather

Share deal versus asset deal: why the distinction matters here

In an asset deal, the buyer purchases specific assets or the business's goodwill, and generally isn't liable for the seller's pre-existing debts or disputes that weren't explicitly assumed. In a share deal, the buyer purchases the company's shares directly — stepping into the company as it stands, including its balance sheet, its past commitments and any liability not yet visible on closing day.

That difference is exactly why a warranty and indemnity clause matters here: it isn't really needed in a straightforward goodwill sale, but in a share deal, the buyer has genuine exposure to what they can't see at signing.

What a warranty and indemnity clause protects against

The mechanism is designed to cover liabilities that existed before closing but only come to light afterward — the kind of thing due diligence, however thorough, can miss.

• A tax reassessment covering a period that predates the sale
• An undisclosed debt or commitment omitted from the accounts reviewed during due diligence
• Litigation that existed at closing but wasn't disclosed during the process
• A social-security or employment dispute rooted in facts predating the sale

How the mechanism actually works

The seller warrants that the accounts and information disclosed reflect the company's real position as of closing, and undertakes to indemnify the buyer if an undisclosed pre-closing liability materialises later. Around that core commitment, both sides negotiate a set of parameters: a financial cap on the seller's exposure, often expressed as a percentage of the price, and a duration — typically longer for tax and social-security matters than for general commercial claims, reflecting how long the relevant authorities can still act. A threshold or basket excluding minor claims is standard practice, so the mechanism deals with real exposure rather than nuisance amounts.

The documents needed to build a reliable warranty package

Negotiating a warranty and indemnity clause credibly depends on having verified, consistent documentation behind it — not just the seller's word.

• Annual accounts and tax filings for the last three years
• Detail of off-balance-sheet commitments: guarantees given, leasing commitments, pledges
• Record of past and ongoing litigation, including matters already settled
• Tax and social-security compliance certificates
• The due diligence report prepared ahead of the deal, which is what actually grounds the scope of what gets negotiated

Where these documents fit in the wider sale process

Most of these documents aren't specific to the warranty negotiation — they're the same ones organised in the standard data room structure we cover in our due diligence data room checklist, largely within the financial, risks and tax-social folders. They typically surface earlier, in a lighter form, at the stage covered in our article on letter of intent documents, before the full data room opens and the detail behind the warranty gets assembled.

Why the negotiated scope depends on documentation quality

When the due diligence report is thin or the underlying documents are incomplete, the buyer has less to go on and typically pushes for a broader guarantee, a higher cap and a longer duration to compensate for the uncertainty. A well-documented file works the other way: it lets the seller negotiate a narrower, shorter guarantee tied to demonstrated, real risk rather than to unknowns the buyer can't rule out.

Centralising collection instead of chasing the owner and advisors piecemeal

As with the rest of a sale process, the documents behind a warranty and indemnity package rarely sit in one place. The owner holds the operational and commercial knowledge, the accountant holds the accounts and tax filings, and outside counsel often holds the litigation and compliance records. Chasing all three separately by email, on top of everything else a sale requires, is where documents get lost or arrive too late to be usefully reviewed.

A structured checklist covering exactly these documents, shared through a secure portal, gives each contact visibility into their own part and keeps a single, tracked view of what's still missing — so the warranty negotiation starts from a complete file rather than one assembled at the last minute.