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Sandbagging and anti-sandbagging in a company acquisition

Sandbagging clauses in a company acquisition: when buyers may preserve claims despite knowledge and how disclosure, warranties and indemnities interact.

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29 June 2026 · Mag. Bernhard Brandauer, Rechtsanwalt

Sandbagging describes the dispute where a buyer knows a risk before signing and nevertheless later asserts warranty claims. In a company acquisition this is not a side issue but a central question of how the data room, disclosure letter and warranty catalogue interact.

Whether the buyer remains protected does not depend on the label alone. The concrete warranty, the definition of knowledge, the reach of disclosure and any anti-sandbagging clause in the SPA matter.

This post classifies the key contractual building blocks and shows how buyer and seller can regulate the issue without duplicating the general warranty review.

Assess claims despite knowledge

Is sandbagging regulated in your SPA?

Answer two questions on knowledge, disclosure and contractual wording. You receive an initial assessment of whether a claim should be documented or sharpened.

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01 Question 1

Was the risk identifiable in the data room or disclosure letter before signing?

Known risks can limit warranties. The contract must state which knowledge counts and how specific disclosure must be.

All paths at a glance

Overview of all answers.

01

The risk should be documented in any event.

If a risk was not disclosed or only disclosed generally, a warranty may still be relevant. Still, the data room status, Q&A and seller answers must be documented precisely.

Before sending a claim notice, check whether the finding is a warranty breach, an indemnity case or merely a known purchase price risk.

02

The contractual logic can be tested and applied.

A clear anti-sandbagging or knowledge clause gives a starting point. The issue then becomes interpretation, evidence and whether the buyer actually waived warranty protection.

Have the clause reviewed before a claim notice so that time limits and minimum content are not missed.

03

Unclear sandbagging wording accelerates disputes.

If there is no clear rule, statutory warranty, contractual warranties and disclosure collide. Sellers face uncertain follow-up claims and buyers face knowledge objections.

Before signing, the contract should say whether known risks are excluded and when a separate indemnity is required.

What sandbagging means in an SPA

Before signing, the buyer reviews the target company. If it finds a problem such as a threatened claim or a weak contract, the later question is whether it may still assert a warranty breach. This is the sandbagging issue.

Under Austrian law the answer is strongly contractual. ABGB and UGB provide the frame for warranty, mistake and damages. The M&A contract therefore regulates expressly whether and how the buyer’s knowledge limits the seller’s warranty liability.

Anti-sandbagging, knowledge and disclosure letter

An anti-sandbagging clause can exclude claims where the buyer knew the risk before signing. A knowledge qualifier can determine whose knowledge counts, for example only the knowledge of specific deal team members. Without this precision, disputes arise over data room access, Q&A answers and internal notes.

The disclosure letter is the counterpart. The seller discloses exceptions to the warranties. The more precise the disclosure, the more likely it is to exclude a warranty breach. General references to the data room are often not enough if the buyer could not identify the concrete risk.

Which source documents matter before a claim

The relevant documents are the signed SPA, the final disclosure letter, the data room index, Q&A records and the version of due diligence reports at signing. Only these documents show whether a risk was known, merely findable or still contractually protected.

For buyers it is important to meet claim deadlines and identify the basis of the claim. Sellers should check whether the disclosure was sufficiently specific and whether the warranty is displaced by an indemnity or a knowledge clause.

Contract review

Classifying sandbagging risks correctly

These points show which findings should be documented or sharpened contractually.

Checkpoints for knowledge, disclosure and warranty claim
Checkpoint Meaning Contractual response
Specific disclosure Specific disclosure Risk described in the disclosure letter Warranty exception or separate indemnity
General data room reference General data room reference Risk only hard to find Regulate knowledge effect expressly
Knowledge qualifier Knowledge qualifier Knowledge of defined persons counts Fix persons and evidence
Claim notice Claim notice Claim must be notified properly Check period, content and recipient

Sandbagging cannot be solved abstractly. The actual contract and documented disclosure decide.

Caution: Do not assume that known risks are automatically excluded. In an SPA, an independent warranty may still matter despite data room knowledge. Booking an initial consultation (72 euro) can help separate claim and defence quickly.

FAQ

Common questions on sandbagging.

Is sandbagging automatically allowed in Austria? +

No. It depends on the contract. Warranty, damages, disclosure and contractual warranties must be read together.

Is a data room reference enough to exclude warranties? +

Not always. The concrete risk must be disclosed clearly enough and the contract must give disclosure that effect.

What should be checked before a claim notice? +

Check the claim period, form, minimum content, warranty basis, disclosure letter and Q&A answers on the risk.

Topics
SandbaggingAnti-sandbaggingSPADisclosureWarranties

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