Assignment notice in the Czech Republic: documents and forms

An owner sells a receivable to a factoring company, or moves a claim inside a corporate group, and treats the transfer as a matter of contract law alone. It rarely is. Until the debtor has been properly notified, the debtor may lawfully pay the original creditor, and that payment discharges the debt even though the receivable has already changed hands.

An assignment notice is what makes a transfer of a claim binding on the debtor: without it, a payment to the original creditor remains valid and cannot later be undone by pointing to the contract. Czech contract law lets either the assignor or, once the transfer is proven, the assignee give the notice, and it takes effect only from the moment the debtor actually learns of it.

What follows sets out who may send the notice, the deadline that starts running once it is given, and the document set a debtor's file should hold before any payment is redirected.

What is an assignment notice, and why does it matter to the owner?

An assignment notice is the single act that shifts risk from the buyer of a claim to the debtor. Before it is given, the debtor's good-faith payment to the seller of the claim is fully valid; after it, the debtor pays the new creditor at its own risk.

For an owner, the point is not abstract. A receivable sold without a documented notice is a receivable that can still be paid away – lawfully – to someone who no longer owns it. The owner then holds a contract claim against the original creditor for money it should have kept, rather than the receivable itself. Recovering that position afterwards takes months a properly notified transfer would not have needed.

Where the debtor pays the original creditor before notice reaches it, that payment discharges the debt in full – the new owner of the claim cannot reverse it and is left pursuing the seller instead.

The notice is not a courtesy to the debtor; it is what decides whose payment counts.

When does an assignment notice apply, and when does it not?

Notice matters whenever a claim, not merely a contract as a whole, changes creditor: sale of receivables, factoring, intra-group assignment, and assignment as loan collateral all trigger it. It does not apply to contract termination, to a contractual penalty that stays with the original party, or to a retention-of-title clause, which protects a seller rather than transferring a claim.

Notice is required wherever the underlying right is a claim capable of being assigned – an invoice, a loan repayment, a damages claim already quantified. It is not required for the transfer of an entire contract together with its obligations, which follows a different route and typically needs the debtor's prior consent rather than a later notice. A separate question, addressed in how contractual penalties and damages are treated, is what happens when the debtor claims a set-off against the assigned claim itself.

A defect notice sent by the buyer of goods is a separate instrument again: it preserves a warranty claim and has nothing to do with who is entitled to be paid under the contract.

What is the route, and what deadline governs it?

The route runs from the assignment contract to the debtor's actual knowledge of it: the assignor may notify directly, or the assignee may present the assignment contract or another document proving the transfer. There is no fixed number of days the notice itself must be sent within – the deadline that matters is the debtor's next scheduled payment, because after notice the debtor pays only the assignee.

• The assignor and assignee conclude the assignment contract, in the form the underlying claim requires.
• The assignor sends notice to the debtor, or the assignee sends it accompanied by proof of the assignment.
• The debtor's next payment falls due after notice is received – that payment must now go to the assignee.
• Any payment made before notice is received or proven remains valid, regardless of when the assignment contract was signed.

A notice sent to the wrong address, or to a debtor that has since moved without informing anyone, does not toll the deadline – the debtor's payment to the original creditor stays valid until notice actually reaches it, and that gap cannot be closed after the fact.

An Austrian factoring buyer recovered a six-figure receivable only after a separate claim against the original seller, once a debtor's payment slipped through two weeks before notice was sent (winter 2025).

A postal receipt proves that an envelope was sent, not that anyone read what was inside it.

What documents and forms must the debtor's file contain?

The debtor's file, once notice has been given, should show three things: the assignment contract or another document proving the transfer, the notice itself with the date it reached the debtor, and confirmation of who the debtor has been paying since. A file missing any of these cannot establish, months later, which payment discharged the debt.

• The assignment contract, or an extract sufficient to prove the claim and the parties.
• The notice as sent, with proof of delivery or of actual receipt by the debtor.
• Any prior correspondence in which the debtor acknowledged the original claim.
• A record of payments made both before and after the notice date.
• If the assignee sent the notice, the document proving the assignment that accompanied it.
• Where the debtor is abroad, a translation of the notice into a language it can be shown to have understood.

A debtor that keeps no record of when notice actually reached it has no defence against a claim that the notice arrived earlier – and personal liability for the manager who authorised a payment is not excluded merely because the company later disputes the date.

From documents and registers alone we can confirm that an assignment contract exists, that a notice was sent and on what date, and what the debtor's payment record shows. We cannot establish what the debtor subjectively understood before that date, nor predict whether a court would treat a disputed delivery as sufficient proof of knowledge.

Act, wait or stop: the decision point before you send notice

Before an owner sends or receives an assignment notice, three positions are available: act now if a payment is imminent and the debtor is still paying the wrong party; wait if the assignment contract itself is still being finalised; stop if the underlying claim is disputed and a contractual penalty or set-off is already in play – for what the other side can do with a penalty claim once notice is contested, see what happens when the other side raises a penalty claim.

• Payment due within days and debtor still paying the original creditor → send notice immediately, with proof of the assignment attached.
• Assignment contract not yet signed → wait; a notice sent before the underlying transfer exists has no effect.
• Debtor disputes the underlying claim or asserts a contractual penalty or set-off → stop and resolve the dispute before relying on the notice to redirect payment.
• Debtor is a foreign entity → send notice with a translation and keep proof of actual receipt, since a postal record alone may not establish knowledge.

Waiting until a claim is disputed to check the paperwork is the most common way owners lose the argument about timing.

An owner who is not sure whether a given transfer needs notice at all is usually looking at a contract that mixes assignment with something else – a penalty clause, a retention of title, or a separate consent requirement. LISTINA prepares a factual report on the underlying claim and the document set already in hand, delivered within a stated number of working days; write to info@listinafirm.com. Representation before a Czech court, if the matter reaches one, is provided by a collaborating advocate.

Where a debtor's payment record already shows money going to the wrong party, the question is no longer whether notice was needed but what the file can still prove about when it arrived. LISTINA reconstructs that timeline from the documents on file and delivers a written report within a set number of working days; write to info@listinafirm.com. A collaborating advocate handles representation if the dispute is taken further.

Frequently asked questions

What does assignment notice cost in time?

There is no fixed number of days the notice itself must be sent within; what matters is that it reaches the debtor before the debtor's next payment, since any payment made before notice is received or proven remains valid. In practice, delay costs money only once a payment has already gone to the wrong party – from that point, recovering it is a separate claim, not a correction of the notice.

Which form is used?

Czech contract law does not prescribe a single form for the notice itself; it can be a letter, an email, or an oral statement, provided it can later be shown to have reached the debtor. A common misconception is that the notice must repeat the wording of the assignment contract – it only needs to identify the claim and the new creditor clearly enough for the debtor to redirect payment.

Is a representative required?

No representative is required to send or receive an assignment notice; the assignor, the assignee, or an authorised employee of either can do it directly. A representative becomes relevant only if the underlying claim is disputed and the matter moves toward a court, at which point representation is provided by a collaborating advocate rather than by LISTINA.

What if the party is abroad?

Where the debtor or assignee sits outside the Czech Republic, the notice route follows the same logic but proof of delivery matters more, since a postal record alone may not establish actual knowledge. Our overview of cross-border transaction practice for Italy sets out one example of how that plays out where the parties sit in different jurisdictions.

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.

An assignment that is never properly notified is not void – it is simply exposed, payment by payment, to being paid away to the wrong side. LISTINA sets out, from the contract and the correspondence on file, whether notice was given and what it proves, with delivery in a stated number of working days; write to info@listinafirm.com. Where the matter needs to go before a Czech court, a collaborating advocate takes it from there.