Video: What Should You Do If Someone Doesn’t Pay Your Invoice?

11 minutes of reading

Shrnutí: If someone fails to pay an invoice, first verify the due date and send the debtor a written demand for payment. You may also claim late-payment interest on the amount owed, provided the legal requirements are met. If a standard reminder does not help, the next step is a pre-litigation demand, followed by a lawsuit if necessary. You can only turn to a debt collection agent once you have an enforceable judgment. In this article, we describe the current procedure in 2026, from prevention to actual debt collection.

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Quick Overview: What to Do About an Unpaid Invoice

  • Check the due date and supporting documents. Verify that the debt actually exists, is due, and that you can document it with, for example, a contract, purchase order, invoice, or correspondence.
  • Send a reminder to the debtor. Specify the amount owed, the invoice number, and set a specific payment deadline.
  • Calculate the additional charges associated with the debt. Depending on the circumstances, you may claim, in particular, statutory or agreed-upon late-payment interest and, if applicable, a contractual penalty.
  • Send a pre-litigation demand before filing a lawsuit. If you subsequently wish to claim reimbursement for litigation costs, you generally need to send a demand for payment at least 7 days before filing the lawsuit.
  • Enforcement proceedings can only begin after an enforcement order has been obtained. An unpaid invoice alone is generally not sufficient for a bailiff to begin enforcing the debt.

If the debtor does not respond to your demands, our attorneys can assess the enforceability of the claim, prepare a pre-lawsuit demand, and propose the next steps so that debt collection does not cost more time and money than necessary.

If you decide to collect a debt, it essentially does not matter what type of debt it is. Our clients most often come to us with debts arising from business activities, but these may also relate to rent or other types of relationships.

Prevention Is Key

Many business owners have not adequately addressed the risks associated with their business. Yet the foundation is always a well-drafted contract. However, don’t think of a contract as just a typical “piece of paper” that both parties sign. We enter into contracts every day—for example, when we go shopping or board a tram. They can therefore take many different forms.

A contract should have clear rules

If you can refer to your General Terms and Conditions (GTC) as part of an order, be sure to do so. Conversely, you can also exclude the application of your business partner’s terms and conditions.

If the other party is a consumer, be cautious. The law prohibits so-called “surprise provisions in a contract.” This refers to provisions in the terms and conditions that a consumer would not normally expect. These may include provisions regarding contractual penalties, etc.

What can be recommended as a good preventive measure to include in your contract?

  • Contractual penalty
  • Interest on late payments —if the debtor fails to pay a monetary debt on time, the creditor may demand interest on late payments, provided the statutory conditions are met. If the amount has not been validly agreed upon, the statutory interest for late payment is based on the Czech National Bank’s repo rate for the first day of the calendar half-year in which the default occurred, increased by 8 percentage points.
  • Deemed Delivery – Explicitly stipulate deemed delivery in the contract, i.e., specify when and how a document is considered delivered (for example, on the third day after being sent to an email address).
  • Choice of court —by selecting a court in the location of your business or residence, you can save on travel costs and delays. However, the ability to contractually agree on the local jurisdiction of a court is not without limitations and also depends on the nature of the relationship; different rules apply, for example, in consumer relationships.
  • Extension of the Statute of Limitations
  • Contact Information —It is best to obtain as much information as possible or, if necessary, include a provision requiring the other party to keep it up to date.

Other preventive safeguards include confirming and securing the contract:

  • They can serve as an incentive to pay the debt (late payment interest, contractual penalty),
  • or they may guarantee payment if the debtor does not have the funds (e.g., a surety or lien).
Tip for article

Tip: How should you go about collecting an overdue debt so you can get your money back as soon as possible, and what steps should you take?

Other tools that can help with prevention:

  • Insolvency Registry —we use it to check the financial situation of the other party. Here, we can determine whether bankruptcy proceedings have already been initiated. If so, it is advisable not to enter into a contract with that entity.
  • Central Register of Enforcement Proceedings —maintained by the Chamber of Bailiffs. It contains information on enforcement proceedings conducted by court-appointed bailiffs. There is a fee for accessing this information.
  • SOLUS Registry —Although only the person who is the subject of the extract may submit a request, in cases of long-term cooperation, for example, you can ask your partner to provide an extract from this registry themselves.
  • Real Estate Cadastre —While you cannot search by name here, you can proceed the other way around. If you know that a specific person owns a property, you can look up that property in the Real Estate Cadastre and verify whether it is encumbered by a lien or a bailiff’s seal.
  • Commercial Register —this is useful if the counterparty is an association, a business entity, etc.; you can find additional information in the register, such as financial statements.
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We will review your documentation, assess your options for debt collection, and choose the approach best suited to your specific situation. We can prepare a pre-litigation demand on your behalf, communicate with the debtor, and, if necessary, represent you in court proceedings.

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Tip for article

Tip: We always recommend offering a settlement during the process. This motivates the other party, who will often make a more concerted effort to find a way to pay. This usually saves you significant costs, and the fact that you pursued an amicable resolution may also be taken into account by the judge during court proceedings.

How to Collect an Unpaid Invoice, Step by Step

Internal Collection —It’s not always necessary to immediately turn to a law firm for every receivable, especially if similar types of receivables keep recurring. However, you can work with an attorney to establish a standard internal process and then use prepared templates. A reminder letter, for example, can serve as such a tool. It is recommended to mention contractual penalties, interest, or collection costs at this stage (depending on what is stipulated in your contract).
If you’re dealing with an unpaid invoice, proceed systematically:

  1. check the due date,
  2. whether the invoice was delivered to the correct person,
  3. whether the debtor disputes the performance itself,
  4. then send a written request for payment and keep proof of mailing.

In the reminder, include at least the invoice number, the amount due, the due date, and the new deadline by which you require payment. The reminder should also include an offer to settle amicably. You can appeal for voluntary payment, but at the same time warn of legal action and referral to a law firm.

We recommend sending the reminder directly to the other party’s data box.

Case file management —in electronic or physical form. Here, we collect everything related to the collection of the debt in question. The basis may be a contract, purchase order, etc., but anything can serve as evidence—chat messages, emails, witness statements, and the like. This also includes information regarding debt security, partial repayment of the debt, etc.

We knowfrom experience that a dispute often does not revolve around the invoice itself, but rather on whether the creditor can prove what the payment was intended to cover. Therefore, we recommend keeping not only the invoice but also the purchase order, handover report, email correspondence, or messages that clearly show that the debtor accepted the goods or services or acknowledged their existence.

Assignment (i.e., sale) of a receivable —at a certain stage, we may decide that it is not worth our while to collect the receivable (for example, if it appears to be uncollectible). This can be done even without the debtor’s consent. There are companies on the market that will purchase receivables, albeit for a fraction of their value. Sometimes, even a time-barred receivable can be enforced in this way. It is always advisable to consult an attorney regarding this procedure.

Legal Collection – To a certain extent, a lawyer will repeat the process of sending a demand letter. At this stage, however, you can engage a lawyer to represent you and send a demand letter in the form of a pre-litigation notice. This can be used to exert even greater pressure on the debtor.

Depending on the agreement with the client, an amicable solution may again be offered (waiver of interest, payment plan, waiver of costs or contractual penalties, etc.). Here, too, it is advisable to point out the mounting costs—in this case, those associated with the law firm’s services. This is usually a motivating factor for the opposing party.

It is necessary to grant an additional grace period for performance and to outline the next steps—i.e., legal proceedings (but never in the form of threats or blackmail).
Without a pre-litigation demand, we run the risk that the court, for example, will not award costs.

What should be included in a pre-litigation demand? A pre-litigation demand or notice should, above all, clearly specify:

  • who is claiming the debt and from whom,
  • the basis for the claim,
  • the number and amount of the unpaid invoice,
  • its due date,
  • any interest or other charges,
  • an extended payment deadline,
  • the account number or other payment method,
  • a warning that failure to pay may result in legal action.

The most common mistake we encounter in debt collection is waiting without a clearly defined next step. The debtor repeatedly promises to pay “next week,” while the creditor spends the following months merely reminding the debtor of the invoice—and in the meantime, the chances of collecting the debt diminish. Therefore, it is advisable to set a specific deadline for each demand and determine in advance what will follow if that deadline passes without payment.

Tip: If you’re searching for a “pre-lawsuit demand letter template,” don’t simply copy and paste a generic text without reviewing it. The content of the demand letter should correspond to the specific circumstances and amount of your claim.

Court proceedings —these may take the form of a trial, resulting in a judgment that determines whether a debt exists and in what amount. This part can be quite lengthy and demanding. However, it can essentially be skipped if a settlement is reached beforehand in the form of a notarial deed, in which the opposing party officially acknowledges its debt.
How do you file a lawsuit against a debtor? The complaint must:

  • identify the parties,
  • describe the relevant facts,
  • state what you are seeking from the debtor,
  • attach available evidence—typically a contract or purchase order, an invoice, proof of performance, correspondence with the debtor, and a pre-lawsuit demand.
  • For monetary claims, the court may also issue a payment order if certain conditions are met.

Enforcement proceedings —follow-up proceedings in which a court-appointed enforcement officer is appointed to ultimately collect the debt.
When should you contact a bailiff regarding an unpaid invoice? As a general rule, you cannot contact a bailiff based solely on an unpaid invoice. First, you need an enforceable judgment—typically a final and enforceable court decision or, for example, a notarial deed with a declaration of enforceability. Only if the debtor fails to fulfill the obligation imposed by the judgment can you file a petition for enforcement.

Tip for article

Tip: Be sure to check out the video on “How to Set Terms for Working with a Freelancer.”

Summary

If a customer fails to pay an invoice, start by verifying the due date and evidence supporting the claim, and then send the customer a written demand for payment. Depending on the circumstances, you may also claim late payment interest or other agreed-upon charges. If a standard reminder is ineffective, follow up with a pre-litigation demand; to ensure potential reimbursement of costs, it is advisable to send this at least 7 days before filing a lawsuit. The monetary claim can then be asserted in court, which may issue a payment order if the conditions are met. You generally turn to a court-appointed enforcement officer only after you have an enforceable judgment and the debtor still refuses to pay voluntarily. This entire problem can be largely prevented by drafting a solid contract, vetting your business partner, and consistently maintaining documentation related to the claim.

Frequently Asked Questions

Do I have to send the debtor more than one reminder before filing a lawsuit?

No. The law does not require the sending of several standard reminders. However, for the reimbursement of litigation costs, it is particularly important that a pre-litigation notice be sent properly and in a timely manner.

Can I collect payment on an invoice if I don't have a signed written contract?

Yes, depending on the circumstances, the existence of an obligation may be evidenced, for example, by an order, email correspondence, a handover report, or other documents. Therefore, the mere absence of a signed contract does not automatically mean that the claim cannot be enforced.

What if the debtor acknowledges only part of the unpaid invoice?

The undisputed portion can be paid separately, and the dispute can continue regarding the remaining portion. When communicating, it is advisable to clearly document what the debtor acknowledges and what the debtor disputes.

Can an unpaid invoice be collected even after the debtor's company has been dissolved?

It depends on the manner and timing of the company’s dissolution and on whether it has a legal successor. If the company is in liquidation or insolvency, the claim must be asserted in a manner consistent with the relevant proceedings.

What if the debtor is in insolvency?

As a rule, a claim cannot be collected through ordinary means outside of insolvency proceedings. The creditor must monitor the insolvency registry and, if necessary, file a claim in a timely manner.

Can a debtor dispute an invoice only after receiving a pre-lawsuit demand?

It can. The dispute may then concern, for example, whether the performance was actually provided, to what extent, or whether it complied with the contract. That is precisely why evidence gathered while the parties were still working together is so important.

Is it worth taking legal action to collect even a small unpaid invoice?

It depends on the amount of the claim, the quality of the evidence, the debtor’s financial situation, and the expected costs of enforcement. Before initiating proceedings, it is therefore advisable to assess not only the legal validity of the claim but also its realistic collectability.

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Author of the article

JUDr. Ondřej Preuss, Ph.D.

Ondřej is the attorney who came up with the idea of providing legal services online. He's been earning his living through legal services for more than 15 years. He especially likes to help clients who may have given up hope in solving their legal issues at work, for example with real estate transfers or copyright licenses.

Education
  • Law, Ph.D, Pf UK in Prague
  • Law, L’université Nancy-II, Nancy
  • Law, Master’s degree (Mgr.), Pf UK in Prague
  • International Territorial Studies (Bc.), FSV UK in Prague
Author of the article

Ondřej is the attorney who came up with the idea of providing legal services online. He's been earning his living through legal services for more than 15 years. He especially likes to help clients who may have given up hope in solving their legal issues at work, for example with real estate transfers or copyright licenses.

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