After closing: Why post-deal disputes now reflect deal pressure, not just drafting
In brief
Post-deal disputes are no longer a drafting clean-up; they are where deal pressure shows up after closing, as compressed timelines, imperfect information and complex cross-border structures leave uncertainty unresolved at signing. Transatlantic architecture and “hybrid” approaches can turn ordinary disagreements into high-leverage contests over forum, evidence and remedies. Representations and warranties insurance changes behaviour and reduces friction, but it does not remove judgment, cooperation burdens or reputational and management drag. And fraud-based allegations are moving from the margins to the centre, forcing boards to stress-test worst-case scenarios and ensure the deal has a real remedy if the asset proves fundamentally misrepresented.
For deal teams, closing usually marks the psychological end of the deal. The agreement is signed, conditions are satisfied, consideration is paid. Attention moves on to growing the new business, and creating value, and the (now largely redundant) contractual documentation gathers dust. As Adam Badawi noted in setting up the discussion, the instinct is to think: you have spent the long nights, cleared the hurdles, made it to closing and you are done. Increasingly, however, that mindset is misplaced.
Post-deal disputes are no longer peripheral clean-up exercises. They are a structural feature of modern cross-border M&A. They are less a reflection of declining deal quality and more a function of how deals are now executed – under tighter timelines, with imperfect information and across increasingly complex legal and commercial frameworks. They also reflect buyers looking increasingly for any extra value that can be extracted – including from the contractual protections.
In this context, disputes are less a breakdown in execution and more a signal of where uncertainty could not be fully resolved at the point of signing. There are many reasons for this shift. Here, we highlight three particular features of many recent post-deal disputes.
Transatlantic structures amplify fault lines
Cross-border deals can introduce additional elements of uncertainty into deals, and sometimes a misalignment of expectation. Differences between US and European approaches to disclosure, loss calculation and remedies can turn manageable disagreements into jurisdictional and interpretive contests.
Forum risk, evidentiary standards and remedies all influence leverage once a dispute arises. Choices made to facilitate deal certainty at signing can materially affect outcomes later. As such, the structures that are agreed to facilitate deal certainty are increasingly becoming a strategic issue for boards overseeing cross-border transactions, and not just a technical concern for lawyers.
Transatlantic hybrid representation and warranty insurance structures are also growing, in response to this concern – where breach is assessed under one legal system and loss under another. These can work well when aligned, but when disputes arise, they introduce complexity that few parties fully anticipate at signing. As Stephen Davidson noted during the Forum, hybrid policies can work extremely well, but parties need to think carefully about what happens when breach is assessed under one law and loss under another – because that is where complications typically emerge.
The practical implication is that transatlantic deals require earlier, not later, integration of disputes thinking into deal architecture – including insurance structures, governing law and escalation mechanisms.
Insurance has changed behaviour – but not eliminated judgment
Representations and warranties insurance has reshaped post-deal dynamics, often for the better. It has reduced emotional friction between buyers and sellers, facilitated cleaner exits and allowed capital to recycle more efficiently. As Stephen Davidson, Managing Director, Transaction Solutions, Aon, observed, insurance has taken much of the emotion out of disputes and allowed deals to move forward more cleanly – an important positive for the M&A market.
But insurance is not a substitute for judgment. Claims still require cooperation, disclosure and credibility. Where communication breaks down – between buyer and seller, or between insured and carrier – disputes escalate unnecessarily.
The data also tells a subtler story. As deal sizes grow and structures become more complex, claim severity increases. Insurance absorbs loss, but it does not insulate boards from reputational risk, management distraction or the opportunity cost of prolonged disputes.
Boards should therefore resist the temptation to treat insurance as a catch-all solution. It is a risk-transfer mechanism, not a risk-elimination one.
Fraud risk has moved from the margins to the centre
Anecdotally, a further interesting development in recent post-deal disputes is the resurgence of fraud-based claims. These are not technical disagreements over accounting policy or interpretation, they are allegations of intentional non-disclosure, misrepresentation or concealment that go to the core value of the asset acquired.
The number one trend I’m seeing is fraud – documents not put in the data room, misrepresentation of assets, or intentional concealment information that makes the company much less valuable than represented, if not almost valueless.
Gayle Klein, Partner and Co-head of US litigation, arbitration and global investigations
The reasons for this trend will never be fully transparent, but are likely to include: (i) recent deals having been executed at pace with compressed diligence windows and higher valuations, creating more scope for aggressive accounting or other issues to be rushed through; (ii) particular pressure on deals and valuations in recent years, with that pressure potentially being passed through to executives and management; and (iii) broader W&I coverage and a more sophisticated user base, potentially leading to a greater willingness by buyers to assess potential wrongdoing more thoroughly when it is identified (so more of these issues are surfacing rather than laying latent).
The uncomfortable reality for buyers is that fraud risk cannot be fully eliminated through diligence alone, particularly in compressed processes. But it can be anticipated and mitigated to an extent through deal design. Clawbacks, holdbacks, earn-outs and targeted indemnities remain powerful tools when aligned properly to risk. Where they are absent, buyers often discover too late that the individuals responsible have exited with value intact.
The lesson is not to litigate more aggressively. It is to stress-test the disaster scenario earlier. Boards should be asking a simple but uncomfortable question before signing: if this turns out to be fundamentally untrue, what is our real remedy?
What this means for post-deal disputes
For boards and deal teams, this is less about eliminating disputes altogether and more about understanding where risk is likely to crystallise – and ensuring it is properly anticipated and mitigated.
Three decision implications follow.
First, disputes thinking must move upstream. Fraud scenarios, adjustment complexity and cross-border enforcement risk should be stress-tested during deal design, not discovered after ownership has changed. As Adam Badawi suggested, the practical questions that matter after closing are often the ones that should have been asked before it.
Second, complexity is often the price of getting deals done. Earn-outs, deferred consideration and hybrid structures can bridge uncertainty – but they do so by carrying judgment forward into the post-closing period. The question is not whether that creates risk, but whether it is understood and governed.
Third, success in post-deal disputes should be measured commercially, not doctrinally. Recovery matters. But so do reputation, management focus and the ability to move on. Boards that define these trade-offs early retain control when disputes arise.
The most resilient transactions are not those that avoid disputes altogether. They are those structured with a clear understanding of where uncertainty will remain – and how it will be managed when it surfaces. In that sense, post-deal disputes are no longer an exception to execution. They are part of it.
