Debt recovery
Unpaid invoice in Luxembourg: the steps to recover your money
Reviewed and approved by a lawyer admitted to the Luxembourg Bar.
Quick answer
In Luxembourg, recovering an unpaid invoice starts with a formal notice. For a certain and undisputed claim, an order for payment or an injunction to pay quickly provides an enforceable title. If the claim is disputed, the court decides on the merits. The title obtained is then enforced by a bailiff (attachment).
Recovering an unpaid invoice in Luxembourg follows a graduated escalation. A formal notice formalises the claim and starts default interest running. If it has no effect, the route depends on whether the claim is disputed: an undisputed claim goes through the order for payment (justice of the peace court) or the injunction to pay (district court); a disputed claim is decided on the merits. The enforceable title obtained is put into effect by a bailiff. For a debtor established in the EU, the European order for payment and the European enforcement order facilitate cross-border recovery.
In short
- Check that the claim is certain, quantified and due before taking action.
- Send a formal notice that sets a deadline and starts default interest running.
- For an undisputed claim: choose the order for payment or the injunction to pay according to the amount.
- For a disputed claim: bring proceedings on the merits before the competent court.
- Have the enforceable title enforced by a bailiff (attachment).
- Debtor in the EU: use the European order for payment and watch the limitation period.
| Step | Purpose | Indicative timescale |
|---|---|---|
| Formal notice | Formalise the claim, start interest running | A few days to 2 weeks |
| Order for payment (justice of the peace court) | Quick title for a small undisputed claim | A few weeks |
| Injunction to pay (district court) | Title for a larger undisputed claim | A few weeks to a few months |
| Proceedings on the merits | Judgment on a disputed claim | Several months |
| Enforcement by a bailiff | Attachment on the basis of the enforceable title | Varies depending on the debtor's assets |
| European order for payment | Cross-border title within the EU | A few weeks to a few months |
Start with a formal notice from a lawyer
Before any proceedings, a formal notice from a lawyer puts your claim on record, starts default interest running and signals your resolve. It resolves a significant share of cases without litigation.
The letter sets a clear deadline and announces the next steps in the event of non payment.
The order for payment for undisputed debts
Where the debt is certain and not seriously disputed, the order for payment provides a quick route to obtaining an enforceable title. It is an effective and economical option.
For debtors established abroad, the European order for payment facilitates cross border recovery.
Proceedings on the merits and enforcement
If the debt is disputed, the dispute is decided on the merits. Once the title is obtained, enforced recovery (attachment) is carried out by a bailiff.
Acting early is decisive: an old debt is harder to recover and risks becoming time barred.
| Criterion | Amicable | Judicial |
|---|---|---|
| Main tool | Reminder, formal notice, payment schedule | Order, injunction, judgment |
| Cost | Low | Procedural and enforcement costs |
| Speed | Immediate if the debtor cooperates | A few weeks to several months |
| Business relationship | Preserved | Often broken |
| Outcome | Voluntary payment or agreement | Enforceable title and attachment |
| When to use it | Debtor acting in good faith | Silence, dispute or bad faith |
Depending on your profile
For SMEs
An SME facing unpaid invoices is well advised to structure its recovery: clear terms and conditions, systematic reminders, a prompt formal notice, then an order for payment or an injunction to pay for undisputed claims. Acting from the first delay protects cash flow and the debtor's solvency.
For the self-employed
For a self-employed person, every unpaid invoice weighs heavily. A formal notice from a lawyer often resolves the matter without a trial. For small amounts, the order for payment before the justice of the peace court provides a quick, inexpensive enforceable title without a complex procedure.
For foreign creditors
A creditor established outside Luxembourg can recover a claim against a Luxembourg debtor by relying on the European instruments: the European order for payment for undisputed claims, followed by local enforcement. Mastery of the rules on jurisdiction and service is decisive.
For e-commerce
An e-commerce business deals with numerous unpaid invoices, often cross-border. Automated reminders, a standard formal notice and use of the European order for payment for customers established in the EU allow a high volume of small claims to be handled efficiently.
Official sources

