Should you pay VAT for an unreliable payer? Defend yourself

JUDr. Ondřej Preuss, Ph.D.
22. August 2025
9 minutes of reading
9 minutes of reading
Tax law

Getting a notice to pay someone else’s VAT in your inbox is not pleasant. In practice, it means that your supplier has issued an invoice with VAT, but has not paid the tax, and the tax office now wants the tax owed by you as the customer. The good news is that the law gives you room to defend yourself.

Who is an unreliable payer

An unreliable taxpayer is a VAT payer who is in serious breach of its tax administration obligations – typically it has significant and long-term arrears, repeatedly fails to fulfil its obligations, has tax assessed according to aids or has an outstanding security order.

An unreliable person refers to entities that are not VAT payers but have seriously breached their VAT obligations (e.g. identified persons). This status may arise by a decision of the tax authority or directly by law, for example when an unreliable taxpayer becomes an unreliable person after cancellation of registration.

For a quick check, a simple online VAT search will give you a clear overview of the VAT entities.

How tax liability works

If you buy something from a VAT payer, you may have to pay the VAT if the VAT payer does not remit the tax. This will happen at a time when you knew, or at least should have and could have known, that the tax would be deliberately not paid. This is also true for advance payments.

When are you deemed to have known, or at least should and could have known?

  • Unreliable taxpayer: the supplier has unreliable taxpayer status with the tax authorities. Typically, this means that the supplier’s VAT register shows “YES” for unreliable.
  • Connected persons: this is a transaction between “connected” entities (typically capital or personnel connections). E.g. parent and subsidiary trading together.
  • Unusual (suspiciously advantageous) price: This is a price that is “completely out of line” without any reasonable reason. For example, if you buy goods with a normal market price of CZK 1,000,000 for CZK 300,000.
  • Payment to a non-published supplier account: You pay cashlessly into an account number that is not published in your supplier’s VAT register. For example, if your supplier sends you the account of a “partner” company but you do not find it in the register under the supplier.
  • Payment by virtual asset: Payment in whole or in part in cryptocurrency/virtual asset. E.g. if the supplier wants part of the price in bitcoin.
  • Cash over the legal limit: Payment in cash exceeding the limit from which the law requires cashless payment.
  • Fuel without a registered distributor: The fuel supplier does not disclose that it is a registered distributor. For example, when a smaller company offers bulk diesel deliveries but is not listed as a distributor on the register.

So if you see a warning light flash when you do business – e.g. the partner is suspicious, the price is too low, they want money in another account or payment in a crypt – you’d better check. If you don’t, and the supplier doesn’t pay the VAT, the tax office will demand the tax from you.

Frequently Asked Questions

What does a published account mean?

The published account is the taxpayer’s bank account that the tax administrator has made available in the VAT Register.

Can the status of unreliable payer be removed?

Yes, the tax administrator can decide, upon request and after meeting the legal conditions, that the taxpayer is no longer unreliable; the change is then published again in the VAT Register. You can read more about the conditions for removal in our article.

What is the current limit for cash payments?

The general legal limit is CZK 270 000. Above that, you must pay cashless.

Time limit and form of defence: timely appeal with suspensive effect

The principal advantage of a guarantor: you can appeal against the notice and a timely appeal has suspensive effect by law, so that you cannot be subject to tax execution during the appeal procedure. The form is a standard appeal under the Tax Code and must be filed with the tax authority that issued the notice within 30 days of service.

What does suspensive effect mean and what does not? It stops the enforcement against you, but does not prevent interest in the debtor’s original proceeding (interest on the principal debt can continue to accrue and you, as guarantor, are generally liable for it – the exception is that the guarantor does not accrue its own separate interest on the default).

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What must not be missing in the appeal

An appeal is your formal statement of disagreement with a decision of the tax office. In order to be considered by the tax authorities, it must meet several mandatory requirements:

  1. Who made the decision: State the exact name of the authority (tax authority) that issued the decision.
  2. Who is appealing: Your identification details – name, address/place of business, VAT number and contact details.
  3. What is the appeal against?
  4. Why do you think the decision is wrong: Briefly and factually describe the reasons – what you see as incorrect (e.g. wrong finding) or unlawful (e.g. incorrect procedure under the rules).
  5. What do you base this on: Include the evidence on which you rely (attachments: contracts, invoices, bank statements, witness statements, etc.). Number each attachment.
  6. What you are requesting: A clear proposal for a verdict: do you want the decision reversed (how specifically?) or set aside?

If your appeal has defects that prevent it from being heard, the authority will ask you to complete it and give you a reasonable time (at least 15 days). If you correct the defects in time, the appeal counts as duly and timely filed. If you do not correct them, the tax authority will stop the appeal.

What to target in your appeal

There is no limit to the scope of objections in a guarantor’s appeal. You can therefore challenge both the existence of the liability itself (e.g. the elements of liability under the VAT Act were not fulfilled – “knew or should have known and could have known”, payment to an undisclosed account, unusual price, etc.) and the correctness and legality of the tax assessed on the debtor as well as the amount of the claimed underpayment.

Access to the file and evidence

Once you have been served with the notice, you have the right to inspect the file and to see the documents on which the tax office relies. The guarantor has the status of a taxpayer after notification of the summons. This means that he/she can request copies of the decision, propose evidence and exercise supervisory remedies (renewal, review).

Therefore, in the appeal, be specific in suggesting what evidence the appellate authority should take (contracts, communications with the supplier, pricing documents, payment statements showing payment to the disclosed account, etc.).

Tip for article

Appeals can be complicated for the layperson. Only an experienced attorney can find all the necessary information and strong arguments. So put your case in our hands.

Is it worth paying or waiting to be sure?

Appealing protects you from recovery but does not stop interest on the main tax from accruing. The Supreme Administrative Court has made it clear that while the surety does not pay its penalty for defaulting on the surety’s notice, it is nonetheless liable for the principal of the debtor’s tax (i.e., the interest that runs on the debtor’s delinquent tax until paid).

Your strategy should therefore be pragmatic: consider payment while continuing to defend. If you are successful on appeal or subsequently in court, the state will refund the overpayment; in the case of an unlawful levy, interest is also due on the tax administrator’s unlawful conduct (if not the full amount, then pro rata).

If you miss the appeal deadline

The Tax Code allows thetax administrator to reinstate a missed deadline for good cause (typically serious illness, natural disaster, etc.). You must apply within 15 days after the reason for the delay has passed. At the same time, the law lists exceptions when a refund is not an option. Therefore, in practice, you must give good reasons for your request (preferably with evidence – e.g. a medical report) and include a missed appeal.

At the same time as or after the defence, you can apply for a stay or for payment to be spread over instalments. The request makes sense if at least one of these situations applies to you:

  • immediate payment would seriously harm you,
  • your livelihood or the livelihood of people who depend on you would be threatened,
  • rapid payment would mean the end of your business,
  • you can’t pay the whole arrears at once,
  • there is a reasonable expectation that the obligation to pay will cease – perhaps a law has been passed but is not yet in force that removes the obligation.

You should also expect an administrative fee of CZK 400 for each tax to which the application relates.

Unsuccessful in your appeal? Administrative action and the possibility of suspensive effect

If your appeal is rejected, you can defend yourself with an administrative action before the Regional Court. The time limit is usually 2 months from the date of service of the decision (unless there is a special time limit). At the same time, you can ask the court to grant you suspensive effect. If the court grants it, this would mean that the enforceability of the contested decision would be suspended until the court decides.

Tip for article

When to turn to the Supreme Administrative Court and how does its decision-making process work in practice? Find out in the next article.

Summary

You are liable for the supplier’s VAT if you knew or should have known and could have known that the tax would not be paid deliberately. Indications include, but are not limited to, unreliable taxpayer status, links between persons, an exceptionally low price without reasonable cause, payment to an undisclosed account, payment (even in part) in cryptocurrency, cash in excess of the legal limit or purchase of fuel from an unregistered distributor.

A demand for payment can be appealed within 30 days – this has a suspensive effect (stops enforcement against the guarantor) but does not stop interest on the principal debt from accruing. The appeal must include identification of the Authority and the appellant, a precise identification of the decision being appealed, the grounds of error/unlawfulness, the evidence and a draft judgment. Both the liability itself (e.g. the statutory elements have not been met) and the correctness of the tax assessed and the amount of the arrears can be challenged.

In practice, it is most worthwhile to consider payment while continuing the defence (if successful, the overpayment is refunded). The missed deadline can be renewed for serious reasons (apply within 15 days of the reason passing). It is also possible to apply for a postponement/payment (administrative fee of CZK 400 per tax). If you are unsuccessful in your appeal, you can file an administrative action with the Regional Court (usually within 2 months) with the possibility to request a stay of action.

Frequently Asked Questions

Can I apply for a grace period and repayment at the same time?

Yes – you can apply at the same time. This makes sense if immediate payment would threaten your livelihood or business. Expect an administrative fee of CZK 400 for each tax affected.

Am I incurring interest while I await the outcome of the appeal?

No – the guarantor does not earn a separate interest on default from the guarantee call. However, the interest on the principal debt runs to the debtor until payment.

What if the file contains information covered by confidentiality?

The Tax Code grants the guarantor the right to waive confidentiality to the extent necessary for the defence. The tax administrator must therefore make the information reasonably available.

Can I also challenge how the tax was determined by the supplier?

Yes – the guarantor can challenge both the existence of the guarantee itself and the legality and correctness of the tax assessed and the amount of the arrears.

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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 10 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

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