Post-closing claim notice in the Czech Republic: step by step

In-house counsel often discovers a warranty breach only after closing, once the target company's own numbers surface it. The share purchase agreement fixes a narrow window for a post-closing claim notice, and once that window closes, the indemnification claim is gone no matter how strong the underlying facts are.

A post-closing claim notice in the Czech Republic is the written notification a buyer sends the seller under the indemnification clause of the transaction agreement, governed by the contractual regime the parties chose under Czech contract law. It must reach the seller within the notice period the agreement fixes, running from closing or from discovery.

This page sets out, step by step, who sends the post-closing claim notice and where, the deadline that controls it, and the document set a Czech court or arbitral tribunal expects to see once it is challenged.

What triggers a post-closing claim notice?

A post-closing claim notice becomes relevant the moment a defect, a warranty breach or an indemnifiable loss surfaces after the deal has closed. The trigger is factual, not procedural: something the parties assumed true at signing turns out not to hold, and the buyer's remedy runs through the notice mechanism the agreement itself sets out.

Typical triggers include an undisclosed liability found in the post-closing accounts, a defect in a warranted asset, a breach of a non-compete or retention-of-title arrangement carried over from the transaction, or the seller's failure to meet a condition the agreement treats as a contractual penalty. None of these triggers, on its own, extends the deadline for notice – the clock the agreement sets runs regardless of how the breach was discovered. Construction-adjacent disputes over defects in a works contract raise a comparable notice logic, discussed in our page on works contracts and construction claims, and the same discipline about timing applies there. Where the loss surfaces gradually, through a series of small discrepancies rather than one clear event, the safer reading is to treat the earliest indication as the date discovery occurred, not the date the picture became complete.

A warranty breach discovered after the survival period for representations has already lapsed cannot be revived by a notice sent afterward – the claim closes regardless of its factual merit.

When does the notice procedure apply?

The post-closing claim notice mechanism applies only where the transaction agreement itself created it: an indemnification clause, a warranty schedule, or a defect-notice provision tied to specific deadlines. Where the agreement is silent, the buyer falls back on general contract remedies, and the applicable limitation period is a different one entirely.

Three conditions decide whether this is the right procedure. First, the agreement must contain an indemnification or warranty clause naming a notice obligation – a bare purchase agreement without such a clause routes the buyer toward ordinary breach-of-contract remedies instead. Second, the loss must fall within the scope the warranty covers; a loss outside that scope is not curable by notice, however promptly it is sent. Third, the survival period for the relevant representation must not have expired – notice sent after survival has run is, as a rule, unenforceable regardless of its content. Where the dispute resolution clause points to arbitration seated outside the Czech Republic, the notice requirement is still governed by the substantive law the parties chose, not by the seat of arbitration. Counsel checking this condition should read the governing-law clause and the notice clause together, since the two are sometimes drafted by different hands and do not always point the same direction.

A Dutch acquirer preserved a mid-six-figure indemnification claim by sending notice within the contractual window, before the seller's counsel could argue the claim had already lapsed (winter 2025).

A defect notice under general contract law and a post-closing claim notice under a warranty clause are not interchangeable – each runs on its own clock.

If a notice deadline on this file is already close, the question is not whether the claim is strong but whether the file is ready in time. LISTINA produces the factual report reconstructing the transaction timeline, the accounts and the correspondence behind a claim, typically within 5–10 working days. Representation before a Czech court or arbitral tribunal, if the claim becomes disputed, is provided by a collaborating advocate. Write to info@listinafirm.com.

The post-closing claim notice route in Czech practice: step by step

The route runs in four stages: identifying the trigger and the governing clause, assembling the evidentiary file, sending the notice within the fixed period, and, where the seller disputes it, escalating to the dispute resolution mechanism the agreement names. Each stage has its own actor and its own deadline.

• Identify the triggering event and the clause it falls under – buyer's counsel, immediately on discovery.
• Assemble the documentary file supporting the claim – buyer's counsel and finance, within days of discovery.
• Send the written notice to the seller at the address or agent the agreement names – buyer, within the notice period the agreement fixes.
• Await the seller's response or the expiry of the response period the agreement sets – both parties.
• Escalate to negotiation, mediation, or the dispute forum the agreement names if the claim is disputed – buyer's counsel, after the response deadline lapses.

• Breach discovered within the survival period → send written notice → buyer or buyer's counsel → within the notice period the agreement fixes.
• Seller disputes the notice → escalate under the agreement's dispute clause → buyer's counsel → within the escalation window, if one is set.
• Survival period about to lapse → send a protective notice even before quantification is complete → buyer's counsel → before the survival deadline, not after.
• No indemnification clause in the agreement → assess general contract remedies instead → buyer's counsel → within the general limitation period, not the notice period.

A notice sent one day after the survival period closes the route entirely – the timeline of the transaction's own contractual deadlines keeps no exception for good faith. Where the seller is domiciled in another EU member state and disputes the claim before its home court, recognition of the resulting decision in the Czech Republic follows a separate route, covered in our note on recognition of a foreign judgment in the Czech Republic.

What must the notice contain?

A post-closing claim notice that will hold up under scrutiny names the breached provision, states the loss with the calculation behind it, and attaches the documents supporting both. A notice that only asserts a breach in general terms risks being read as inadequate under the agreement's own notice clause.

• The specific clause of the agreement the notice invokes.
• A description of the breach or the triggering event, dated.
• The loss calculation, with the underlying figures identified.
• The supporting documents – invoices, correspondence, the relevant excerpt from the target's accounts.
• The date of discovery, where the notice period runs from discovery rather than from closing.
• The address or agent named in the agreement for service of notice.

An Austrian parent company lost a warranty claim that a Czech court found time-barred, six months after the survival period had lapsed on a notice that named the breach but never the underlying figures (autumn 2025). A reconstructed transaction file – the kind produced by our transaction due diligence report – identifies which figures a notice needs before it is sent, not after a dispute has already started.

A notice naming the breach but not the figures behind it is a common gap, and it is usually the seller's counsel, not the tribunal, who notices it first.

Where the file behind a claim has gaps – missing correspondence, an incomplete accounts trail, an unclear discovery date – those gaps are cheaper to close before the notice is sent than to explain afterward. LISTINA's factual reports on transaction records are delivered within 5–10 working days as a rule. Representation in any resulting dispute is handled by a collaborating advocate. Contact info@listinafirm.com.

Act, wait, or stop: the decision point

Once a trigger is identified, in-house counsel faces one of three positions: the survival period still has room, the survival period is closing, or it has already closed. Each position calls for a different response, and treating them alike is the most common way a valid claim is lost.

Where time remains, the priority is completing the documentary file before sending notice, since a notice that must later be corrected weakens the claim rather than strengthens it. Where the survival period is closing, a protective notice – sent even before the loss is fully quantified – preserves the claim while the file is completed. Where the survival period has already lapsed, the claim is, in general, gone; the remaining question is whether a different remedy under general contract law survives on its own limitation period, which is a separate assessment made against a different clock.

Waiting for a complete damages calculation before sending notice, once the survival period is running out, is the single most common way an otherwise sound indemnification claim is lost for good.

What a documents review cannot establish in advance: whether the seller will dispute the timeliness of the notice, whether an arbitral tribunal or court will read the survival clause narrowly or broadly, and whether the underlying defect will be characterised as a breach of warranty or as ordinary business risk. Those questions are decided by the forum seized of the dispute, not settled by the file before it is filed.

Frequently asked questions

When is post-closing claim notice the wrong step?

It is the wrong step where the transaction agreement contains no indemnification or warranty clause naming a notice obligation, or where the loss falls outside the scope the warranty actually covers. In those cases the notice mechanism does not apply, and the buyer's remedy runs through general contract law instead, on its own limitation period.

What is the alternative?

Where no notice clause applies, the alternative is a claim for breach of contract under general Czech contract law, or, where the loss concerns a defect in a delivered asset, a defect notice under the rules governing that specific contract type. Each alternative runs on its own deadline, separate from the transaction agreement's notice period.

What stops the clock?

As a rule, nothing stops the clock once the notice period in the agreement has started to run, unless the agreement itself provides for suspension – for example while the parties negotiate in good faith under a clause naming that effect. Silence in the agreement on this point means the period runs without interruption, and treating negotiation itself as an automatic suspension is a common and costly misreading.

What is enforceable afterwards?

A notice sent within the period, naming the clause, the breach and the loss with supporting documents, is the basis a court or arbitral tribunal will treat as validly raising the claim. What becomes enforceable after that is the underlying indemnification obligation itself, decided on the merits the tribunal or court finds – the notice preserves the claim, it does not decide it.

LISTINA produces factual reports from documents and public registers. It does not provide legal advice and does not represent parties. Where a matter requires representation before a Czech court or authority, it is handled by a collaborating advocate.

Adam Pospíšil works on deals and corporate structure.

If a notice deadline on this file is measured in weeks rather than months, the file needs to be complete before it moves, not after. LISTINA produces the factual report reconstructing the transaction record, the defect or breach, and the document trail behind an indemnification claim, typically within 5–10 working days. Representation before a Czech court or arbitral tribunal, if the claim is disputed, is provided by a collaborating advocate. Write to info@listinafirm.com.