Sandbagging

Definition

The scenario is not hypothetical. Seller signs R&W "no pending tax procedures". Buyer notes during DD a pending VAT inspection in dataroom folder 4.3.7, doesn't specifically ask about it, and the seller doesn't write anything into the disclosure letter. SPA is signed with the R&W intact. Nine months post-closing, a final VAT assessment of €120k is issued. Can the buyer claim? This is the sandbagging question: can the buyer fall back on R&W despite knowing the fact before closing?

The legal reality in the Benelux differs fundamentally from the American tradition. In Delaware (US norm), "buyer's knowledge is irrelevant": sandbagging is permitted in principle unless explicitly banned. In the Benelux the doctrinal outcome is less clear-cut but buyer-favourable in practice: courts in Belgium (Book 5 BW) and the Netherlands (Book 6 BW) interpret R&W as standalone contractual representations whose content is not affected by buyer knowledge unless there is clear fraud or abuse. Result: silence in the SPA on sandbagging typically falls in the buyer's favour.

Three SPA clause variants are negotiated in Benelux mid-market deals. First, "pro-sandbagging" (explicitly allowed): "the seller's liability under the R&W is not affected by any knowledge of the buyer, however and whenever acquired". This is buyer-favourable and gets pushed by buyers when they have strong leverage. Second, "anti-sandbagging": "the seller is not liable for R&W claims relating to facts the buyer had knowledge of before closing, whether or not such knowledge is recorded in the disclosure letter". This is seller-favourable and gets requested in competitive auctions where sellers have leverage. Third, "silent SPA": no clause, outcome left to court: in Benelux practice typically buyer-favourable.

The defensive strategy for sellers is straightforward: make the disclosure letter as specific as possible. A fact properly disclosed no longer falls under R&W. Sandbagging is only relevant for facts not explicitly disclosed but that the buyer nonetheless knew (from dataroom, DD questions, external sources). By explicitly capturing everything in the dataroom in the disclosure letter with file reference, the seller effectively closes off the sandbagging route. We see sellers who understand this spend 25-40% more time on the disclosure letter than less prepared sellers: and achieve on average 60-70% fewer post-closing R&W claims as a result.

Worked example

A Brussels software business was sold for €9m EV under a silent SPA (no sandbagging clause). Seller signed R&W "all software IP is owned by the company". In dataroom folder 7.2 sat a 2021 developer contract with an external consultant explicitly stating "all generated IP remains property of consultant unless separately bought out". Buyer noted this during DD but asked no follow-up. Disclosure letter contained no reference to this contract. Post-closing the buyer realised about 12% of the codebase had legally unclear ownership. Buyer filed an R&W claim for €380k estimated rectification cost. Brussels commercial court ruled: the R&W is a standalone representation; buyer knowledge is irrelevant in a silent SPA. Seller paid €380k under the cap. Lesson: without an anti-sandbagging clause the seller must explicitly capture EVERY known deviation in the disclosure letter: buyer knowledge does not automatically protect the seller.

When it matters

In every SPA where R&W clauses are signed. Three negotiation points: (1) try to get an anti-sandbagging clause in competitive auctions or where the seller has strong leverage: buyers often resist but concede with enough market interest; (2) if anti-sandbagging isn't achievable, ensure the disclosure letter explicitly captures every known deviation with file reference: that de facto closes the sandbagging route; (3) never accept an explicit pro-sandbagging clause without compensation elsewhere in the SPA (lower cap, shorter survival, extra disclosure latitude).

Frequently asked

Can a buyer sandbag in Belgium or the Netherlands without an explicit SPA clause?

In practice yes. Belgian and Dutch courts interpret R&W as standalone contractual representations whose content is not affected by buyer knowledge unless there is clear fraud or abuse. Silence in the SPA typically falls in the buyer's favour.

How do I protect myself as seller against sandbagging?

Two main strategies: (1) negotiate an anti-sandbagging clause in the SPA: buyers often resist but concede with strong seller leverage or in competitive auctions, (2) if anti-sandbagging isn't achievable, build an extremely specific disclosure letter that explicitly captures every known deviation: that de facto closes the sandbagging route.

What's the difference between pro-sandbagging and anti-sandbagging?

Pro-sandbagging: SPA clause explicitly stating that buyer knowledge does not affect R&W liability: the buyer can claim for issues they knew before closing. Anti-sandbagging: SPA clause stating that the seller is not liable for R&W claims relating to facts the buyer knew before closing.

Does R&W insurance make sandbagging less relevant?

Partly. R&W insurers explicitly exclude "known issues": anything in the dataroom or disclosure letter is not covered by the policy. But the policy does cover R&W claims for issues the buyer did not know, regardless of sandbagging position. For sellers with a W&I policy, sandbagging risk reduces significantly but doesn't disappear entirely.