How to Verify an EU VAT Number with VIES

Check the customer before choosing invoice treatment#

A customer sends a VAT number with its billing details. Your first task is to establish that the number belongs in that customer’s record; your second is to decide the tax treatment of what you are selling. Keep those decisions separate. A valid registration is useful evidence, but it cannot turn every cross-border invoice into a reverse-charge invoice.

The European Commission’s VIES service retrieves VAT information from national systems. Use it for the customer’s EU number, rather than a company-registration number or an internal tax reference.

Run the lookup#

1. Collect the contracting customer’s legal name, country and VAT number from its billing contact. Keep the original details so a correction can be traced.
2. Open the official VIES validator linked from the Commission’s guidance. Choose the Member State associated with the VAT number.
3. Enter the number as the form requests. When the country is selected separately, avoid accidentally duplicating its prefix; check any format error against the customer’s original number.
4. Submit the validation. Read the returned status and any identity information provided. If requester details are offered and apply to you, enter your own details accurately rather than inventing an EU VAT registration.
5. Save the response and check time in the customer record, including a consultation/reference number if returned. Note which number and entity were checked.

For example, a French freelancer billing a German business should select Germany and check the German customer’s number. The lookup answers a registration question. The nature of the service, the customer’s business status and any special place-of-supply rule still determine how the invoice is treated.

Read the response before acting#

The Commission’s guidance identifies possible reasons for an invalid result: a nonexistent number, missing intra-EU activation or registration still being finalized. National tax authorities can confirm whether a number is associated with the supplied name and address when that is not available in the response.

Resolve an invalid number without guessing the tax#

Send the customer the number you checked and ask it to confirm both the number and the invoicing entity. This catches a frequent administrative problem: a trading brand is supplied while a different group entity is contracting. Preserve the correction as a new check rather than overwriting the old response.

An invalid VIES result does not automatically mean the supplier must charge its domestic VAT. Establish the customer’s status and the supply’s place of taxation. Under Article 18 of Implementing Regulation 282/2011, a customer awaiting a VAT number can, under the stated conditions, be supported by other evidence of taxable-person status and reasonable verification. That route is conditional; an unsupported claim of registration is not enough.

Keep the decision owner involved when evidence conflicts. The useful question is specific: which customer-status evidence and supply rule justify this invoice? Avoid converting an unresolved lookup into an automatic reverse-charge approval or an automatic tax charge.

Handle outages without losing the invoice deadline#

When VIES is unavailable, save the error and retry later. If an invoice deadline is approaching, route the case to the person responsible for VAT treatment with the customer’s existing registration evidence and the deadline. An outage does not extend statutory invoicing deadlines. Follow the applicable evidence and correction procedure rather than putting every invoice on an indefinite hold.

Do not change a stored result from unavailable to valid because a later retry succeeds. Keep both responses and the resulting invoice decision. That history explains what the team knew at the time.

Use the validation in the actual supply analysis#

The Commission’s place-of-taxation guidance distinguishes goods, general B2B services, B2C services and special cases. For general B2B services the customer’s establishment is normally central; property-related, event and other special services can follow different rules. A VAT number cannot replace that classification.

For a non-EU freelancer, a valid EU customer number does not create an EU VAT registration for the supplier. Check the obligations of the supplier’s jurisdiction, the customer jurisdiction and the particular supply. Use reverse-charge wording and registration identifiers only where the applicable invoicing rules call for them.

A practical invoice file contains the contracting entity, the service or goods supplied, supply date, customer-status evidence, relevant locations and the chosen VAT treatment. Attach the lookup to that file instead of treating it as a free-standing permission slip.

Keep UK and Northern Ireland scope clear#

GB VAT numbers use the UK validation route rather than VIES. Northern Ireland’s XI identification relates to the EU-facing goods arrangements; do not apply it as a general EU services rule. HMRC’s Northern Ireland guidance explains the goods boundary. A freelancer selling a service needs the services analysis, even when the customer is in Northern Ireland.

Store a record that finance can use#

For repeated billing, recheck when the billing entity or VAT number changes and at the cadence appropriate to the transaction and local requirements. Do not present an arbitrary monthly check as a universal statutory rule. Restrict access to the records to the people who need them for billing and review.

If an accounting tool automates VIES, test its error states as well as its valid state. A format check is not a live registration check, and a manual override should capture the reason and decision owner. The final invoice should use the same customer identity as the approved record.