VIES Check a VAT Number: Avoid Costly EU VAT Errors in 2026

When businesses search for “VIES check a VAT number,” they usually want to confirm whether an EU VAT number is valid for cross-border transactions. The European Commission’s VIES tool allows online sellers and other businesses to verify whether a VAT number is recognised for intra-EU trade.

For online sellers, marketplaces and ecommerce businesses, this check is particularly important when dealing with EU business customers, suppliers or commercial partners. An incorrect or inactive VAT number can affect invoicing, VAT treatment and the evidence needed to support cross-border B2B transactions.

However, a successful VIES result does not prove that a company is financially reliable or trustworthy. It only confirms that the VAT number is currently recognised for intra-EU VAT purposes.

In this guide, we explain how to use VIES to check a VAT number, what valid and invalid results mean, and what to do when your own VAT number or a customer’s VAT number cannot be verified.

Need help with a VAT registration, an inactive VAT number or wider EU VAT compliance? Contact our VAT experts and get practical guidance on your next steps.

What is VIES?

VIES stands for the VAT Information Exchange System. It is an official online VAT validation tool provided by the European Commission.

Although VIES is often described as a database, it operates more like a search engine. When you submit a VAT number, the system requests information from the national VAT database of the country that issued that number.

A VIES result normally shows whether the VAT number is:

Valid for cross-border EU transactions

Invalid or not currently recognised for intra-EU trade

The European Commission confirms that VIES can be used to check whether a business is registered to trade cross-border within the EU. The information is retrieved from national VAT databases.

How to use VIES check a VAT number correctly

To use VIES check a VAT number correctly, you will need:

• The EU country that issued the VAT number
• The VAT number in the correct format
• Your own VAT number, if you want the validation record to identify the requesting business

Follow these steps:

1. Open the European Commission’s VIES VAT number validation tool.
2. Select the country that issued the VAT number.
3. Enter the VAT number without unnecessary spaces or punctuation.
4. Enter your own VAT number if relevant.
5. Submit the request.
6. Save or print the validation result for your VAT records.

A VIES check a VAT number result should be saved with your transaction records. This provides evidence that the number was checked before you applied a particular VAT treatment to the sale.

Keeping evidence of the check can be important if the VAT treatment of a transaction is later reviewed by a tax authority.

What does a valid VIES result mean?

A valid result means that the VAT number is recognised in the relevant national system for cross-border EU transactions.

Depending on the issuing country and the information made available, the result may also confirm that a particular name and address are associated with the VAT number.

A valid VIES result can help support the VAT treatment of an intra-EU B2B transaction. For example, it may form part of the evidence used when applying the reverse charge or treating an intra-Community supply as exempt from VAT.

However, a valid result does not confirm:

• That the company is financially stable
• That the company has no tax debts
• That the company is genuine in every commercial respect
• That every transaction qualifies for 0% VAT
• That the reverse charge automatically applies
• That the VAT number will remain valid indefinitely

A VIES check should therefore be combined with a review of the transaction, customer details, invoice wording and transport evidence.

What does an invalid VIES result mean?

When you use VIES check a VAT number and receive an invalid result, this does not automatically mean that the business is fraudulent or that the VAT number does not exist.

An invalid result may mean:

• The VAT number was entered incorrectly
• The wrong issuing country was selected
• The VAT registration process has not been completed
• The VAT number has not been activated for intra-EU transactions
• A separate cross-border registration is still pending
• The national database has not yet been updated
• The number has been cancelled or deactivated
• The national VAT database is temporarily unavailable

If the system is temporarily unavailable, repeat the check later. If the number continues to appear as invalid, the business should contact the national tax authority that issued it.

What should I do if my own VAT number is invalid in VIES?

If your own VAT number appears as invalid, first confirm that:

• You selected the correct issuing country
• The VAT number was entered correctly
• The correct country prefix was used
• Your VAT registration has been approved
• Activation for intra-EU transactions was requested where necessary
• The activation process has been completed

Some countries may issue a domestic VAT number before completing the separate activation needed for intra-EU transactions. This means a number may be usable for domestic VAT purposes but still appear as invalid in VIES.

This can affect your ability to:

• Make intra-EU acquisitions
• Apply certain cross-border VAT treatments
• Issue invoices using the reverse charge
• Provide valid VAT details to customers or suppliers
• Submit accurate EC Sales Lists
• Complete marketplace or supplier onboarding

Not sure why your VAT number is missing from VIES? Book a free consultation and let hellotax review your VAT registration and cross-border activation status.

What should I do if a customer’s VAT number is invalid?

Do not automatically apply a cross-border B2B VAT exemption or reverse charge when a customer’s VAT number cannot be validated.

Instead:

• Ask the customer to confirm the VAT number
• Check the country prefix and number format
• Look for typing errors
• Repeat the VIES check later
• Ask whether intra-EU activation is still pending
• Request alternative registration evidence where appropriate
• Review whether local VAT should be charged until the issue is resolved

The correct VAT treatment depends on the type of transaction. An invalid result should therefore be investigated before the final invoice is issued.

Can I use VIES to find a company’s VAT number?

No. VIES is a validation tool, not a general business directory.

You normally need to know the VAT number before using the system. VIES then checks whether that number is recognised for intra-EU trade.

If you do not know a company’s VAT number, you should request it directly from the business or check its invoices, contracts, website details or official national company records.

Can VIES check UK VAT numbers?

VIES is mainly used for VAT numbers issued by EU Member States and recognised for intra-EU transactions.

Following Brexit, standard Great Britain VAT numbers are generally checked through the UK tax authority’s VAT number checking service rather than VIES.

Northern Ireland businesses trading in goods with EU businesses may use VAT numbers beginning with the XI prefix. These numbers may be relevant for EU goods transactions and can be checked through VIES where applicable.

Does a valid VAT number mean I can charge 0% VAT?

No. A valid VAT number is only one part of the evidence needed to support cross-border VAT treatment.

For an intra-Community supply of goods, you may also need:

• Evidence that the goods moved between two EU countries
• A valid VAT number belonging to the customer
• Correct invoice wording
• Correct VAT return reporting
• An EC Sales List where required
• Evidence that the customer is acting as a taxable business

For cross-border services, the place-of-supply rules and reverse-charge conditions must also be reviewed.

VAT numbers help identify the tax status of the customer and can help determine where a transaction is taxed, but they do not decide the full VAT treatment on their own.

When should online sellers use VIES check a VAT number?

Online sellers should use VIES check a VAT number when onboarding a new EU business customer, before applying the reverse charge, when preparing an EC Sales List, or when a customer’s VAT details change. The check is also useful when a newly issued VAT number must be confirmed for intra-EU transactions.

Regular VAT number validation can help reduce the risk of:

• Applying the wrong VAT treatment
• Issuing incorrect invoices
• Using an inactive customer VAT number
• Submitting inaccurate EC Sales Lists
• Losing evidence during a VAT audit
• Delays in supplier or marketplace onboarding
• Problems with intra-EU stock movements
• Incorrect reverse-charge treatment

This is especially relevant for Amazon, Shopify and other ecommerce sellers that combine B2B sales, cross-border stock movements and multi-country VAT registrations.

For a wider review of registrations, returns, OSS and recordkeeping, use our EU VAT compliance checklist.

How often should VAT numbers be checked?

There is no single EU rule requiring a VIES check before every transaction. However, relying on a check completed several years ago creates unnecessary risk.

A practical approach is to check a VAT number:

• When onboarding a new B2B customer
• Before applying cross-border VAT treatment for the first time
• When customer details change
• If the number is rejected by invoicing software
• If the number is rejected in an EC Sales List
• Periodically for regular high-value customers
• Before a significant cross-border transaction
• When the customer changes its legal name or address

You should retain the date, response and validation reference where one is provided.

VIES and EC Sales Lists

VIES validation and EC Sales Lists are closely connected, but they are not the same thing.

VIES is used to validate whether a VAT number is recognised for intra-EU transactions.

An EC Sales List, also called a recapitulative statement in some countries, is a VAT report used to declare certain cross-border supplies made to VAT-registered businesses in other EU countries.

If a customer’s VAT number is invalid, this can create problems when preparing the EC Sales List and may also affect the VAT treatment of the underlying transaction.

Online sellers should make sure the VAT number shown on the invoice, VIES validation record and EC Sales List is consistent.

VIES and Amazon sellers

Amazon sellers may need to check VAT numbers in several situations.

For example:

• Selling goods to an EU business customer
• Moving stock between VAT registrations in different EU countries
• Checking whether a newly issued VAT number is active for intra-EU transactions
• Validating supplier VAT details
• Preparing EC Sales Lists
• Providing VAT evidence to marketplaces or fulfilment partners

Amazon FBA sellers may hold several VAT numbers because stock storage can create registration obligations in multiple countries. Each VAT registration may need to be activated correctly before it can be used for cross-border EU transactions.

If your business stores stock in several countries, our guide to Amazon FBA VAT compliance explains how stock locations, VAT registrations and cross-border reporting interact.

How hellotax can help with VAT registration and VIES issues

A VIES check can confirm whether a VAT number is recognised for cross-border EU trade, but it does not tell you whether your wider VAT setup is correct.

hellotax helps online sellers with:

• VAT registration in relevant European countries
• Reviewing incomplete or inactive VAT registrations
• OSS registration and quarterly returns
• Regular VAT return preparation and filing
• Amazon FBA and stock-location VAT obligations
• Tax authority correspondence
• Taking over registrations from another provider
• Reviewing missed or overdue VAT returns

If a VAT number appears as invalid, the underlying issue may be more than a technical error. It could indicate missing intra-EU activation, an incomplete registration or a wider compliance gap.

Contact our VAT experts and get practical support with your EU VAT registrations and filings.

FAQs about VIES VAT number checks

How do I use VIES to check a VAT number?

Open the European Commission’s VIES tool, select the issuing country, enter the VAT number and submit the request. The result will show whether the number is currently recognised for intra-EU transactions.

Why should I use VIES check a VAT number before invoicing?

Using VIES check a VAT number before invoicing can help confirm whether the customer is registered for intra-EU trade. This supports the VAT treatment of the transaction, but you must still check the place-of-supply rules, invoice wording and other supporting evidence.

What is a VIES VAT number check?

A VIES VAT number check confirms whether an EU VAT number is recognised for cross-border trade within the European Union. The result is retrieved from the national VAT database of the country that issued the number.

Is VIES an official EU VAT number checker?

Yes. VIES is provided by the European Commission and uses information retrieved from national VAT databases.

Why is a valid VAT number showing as invalid in VIES?

The number may not yet be activated for intra-EU transactions, the registration may still be pending, the national database may not have been updated, or the service may be temporarily unavailable.

Can I use VIES to find a company’s VAT number?

No. You normally need to know the VAT number before using VIES. The system validates a number but does not provide a general search directory of companies and VAT numbers.

Does VIES show a company’s name and address?

The information shown depends on the issuing country and its national data-protection rules. In some cases, the system may confirm whether a submitted name and address match the VAT number rather than displaying the full details.

Does a valid VIES result prove that a company is trustworthy?

No. VIES confirms VAT registration status for intra-EU trade. It does not check creditworthiness, ownership, tax debts, fraud risk or general commercial reliability.

Should I keep evidence of a VIES check?

Yes. Keeping the result helps demonstrate that you validated the VAT number when deciding how to treat a cross-border transaction.

What should I do if VIES is unavailable?

Try the check again later. VIES depends on national VAT databases, so temporary unavailability may affect one or more countries.

Can hellotax help if my VAT number is invalid?

hellotax can help review whether your registration is complete, whether intra-EU activation is missing, and whether wider VAT registration or filing issues need to be resolved.

VIES check a VAT number before cross-border transactions

Using VIES check a VAT number before invoicing is an important compliance step when selling goods or services to EU business customers.

Remember:

• VIES checks whether a VAT number is recognised for intra-EU transactions
• A valid result does not prove that a business is trustworthy
• An invalid result may be caused by missing activation or a pending registration
• VIES does not find unknown VAT numbers
• The validation result should be saved with your VAT records
• A valid VAT number alone does not automatically justify 0% VAT or reverse charge

If your own number is invalid, contact the issuing tax authority or your VAT provider

Need help with a VAT number, registration or filing issue?

Book a free consultation and let hellotax review your EU VAT compliance setup.