As a car dealer with EU business, you face a critical obligation: verifying the VAT ID – for every single intra-Community transaction. Those who neglect or carelessly perform this verification risk full VAT back-payment on supposedly tax-free supplies. In this guide, you will learn step by step how to correctly verify your business partners’ VAT identification numbers, which systems can help you, and how to fulfill your documentation obligations in a legally secure manner.
What is the VAT ID (VAT identification number)?
The VAT identification number – abbreviated as VAT ID or USt-IdNr. in German – is a unique identifier that companies within the European Union receive for cross-border trade in goods and services. In Germany, it is issued by the Federal Central Tax Office (BZSt) and always begins with the country code DE, followed by nine digits.
VAT ID vs. tax number – the difference
| Feature | VAT ID (USt-IdNr.) | Tax number |
|---|---|---|
| Issued by | BZSt (Federal Central Tax Office) | Responsible local tax office |
| Format (DE) | DE + 9 digits (e.g. DE123456789) | 10–13 digits, varies by region |
| Area of use | Intra-Community trade (EU) | National tax returns |
| Required for | EU B2B transactions | Every tax registration |
| Verification possible via | VIES / BZSt | Not publicly verifiable |
Good to know: For intra-Community supplies pursuant to § 6a UStG, only the VAT ID is relevant – not the tax number. Without a valid VAT ID of the buyer, the supply cannot be processed tax-free.
Why must car dealers verify the VAT ID?
Verifying the VAT ID is not a voluntary duty of care, but a legal prerequisite for the tax exemption of intra-Community supplies. The background: German law and the EU require that suppliers actively demonstrate that their business partner is indeed a VAT-registered company in another EU member state.
§ 6a UStG – tax-free intra-Community supply
For an intra-Community supply to remain tax-free, several conditions must be met simultaneously pursuant to § 6a UStG:
- The goods physically arrive in another EU member state
- The acquirer is an entrepreneur with a valid VAT ID of another member state
- The acquirer is subject to acquisition taxation in their country
- The supplier has properly verified and documented the acquirer’s VAT ID
Good-faith protection pursuant to § 6a para. 4 UStG
So-called good-faith protection only applies if you can prove that you fulfilled all reasonable duties of care. This mandatorily includes the qualified query of the VAT ID via the BZSt or the VIES system. Only if you acted in good faith and documented the verification can you rely on this protection in case of dispute.
The VIES system of the EU Commission
VIES stands for VAT Information Exchange System and is the official online verification system of the European Commission. Via VIES, you can verify in real time whether a VAT ID in any EU member state is valid and active.
How VIES works
The VIES system connects the national tax databases of all 27 EU member states. When you query a VAT ID, VIES sends your request to the responsible national authority of the respective country, which confirms or denies in real time whether the number is valid.
- Access at: ec.europa.eu/taxation_customs/vies
- Available in all EU official languages
- Free of charge and usable without registration
- Result is displayed immediately
Tip: VIES is sometimes unavailable due to maintenance of individual country databases. Plan a buffer for time-critical transactions or alternatively use the direct BZSt query via our tool.
Simple vs. qualified query – the crucial difference
When verifying the VAT ID, two procedures are distinguished in Germany that differ fundamentally in their legal weight:
| Criterion | Simple query | Qualified query |
|---|---|---|
| Scope of verification | Only validity of the VAT ID | Validity + matching of name, address, city |
| Result | Valid / Invalid | Valid + match of company data |
| Conducted via | VIES website, BZSt (online/XML-RPC) | Only via BZSt (online, written, XML-RPC) |
| Confirmation letter | No | Yes – official BZSt confirmation letter by mail |
| Legal recommendation | For initial check / quick check | Strongly recommended for all vehicle transactions |
| Good-faith protection | Limited | Full (with proper documentation) |
The BZSt confirmation letter
With the qualified query via the Federal Central Tax Office, you receive an official confirmation letter by mail. This document is your most important piece of evidence in the event of a tax audit. It contains:
- The queried VAT ID and your own VAT ID
- The date of the query
- The result of the data matching (name, address, city)
- An official confirmation notice
Verifying the VAT ID – step-by-step guide
Step 1: Request the VAT ID from the business partner
Request the VAT ID before issuing the invoice. Check the format: each EU country has its own format (e.g. DE + 9 digits, FR + 11 characters, IT + 11 digits). An incorrectly formatted number immediately indicates a problem.
Step 2: Simple query via VIES
Visit the VIES website and enter the VAT ID. The system confirms within seconds whether the number is valid. Save a screenshot with timestamp as initial proof.
Step 3: Qualified query via the BZSt
For vehicle transactions, always conduct a qualified query. Go to the BZSt website (evatr.bff-online.de) and enter your own VAT ID, the VAT ID of the business partner, as well as name, city, and postal code. The BZSt matches the data and sends you the confirmation letter.
Step 4: Document the result
Assign the verification result to the respective business transaction. Note the date of the query, the verified VAT ID, and the result in your records. When using the AutoPult VAT ID module, this happens automatically.
Step 5: File the confirmation letter
Once the BZSt confirmation letter arrives, file it with the respective transaction. For regular business partners, a repeat verification is recommended at least every 3–6 months.
When must you verify the VAT ID?
The short answer: For every intra-Community transaction. In practice, this means for car dealers:
- Before every vehicle sale to EU business partners – without exception
- At the first business relationship – qualified query mandatory
- For every subsequent delivery – at least a simple query
- When business partner data changes – new qualified query
- Regularly for ongoing business relationships – recommended every 3–6 months
- When importing vehicles from EU countries – verification of the supplier’s VAT ID
Practical tip for car dealers: Maintain an internal list of all EU business partners with the date of the last VAT ID verification. This way, you maintain an overview and can immediately demonstrate compliance during a tax audit.
Documentation obligations – what the tax office wants to see
Documentation is the linchpin when it comes to VAT ID verification. Without complete records, the tax exemption of your intra-Community supplies is not secured. The tax office expects the following documents:
Mandatory documentation per business transaction
- Copy or printout of the VIES query with date and time
- BZSt confirmation letter (original) for qualified queries
- Assignment of the verification to the specific transaction (invoice number, vehicle VIN)
- Proof of arrival or CMR consignment note as transport proof
- Copy of the invoice with the VAT IDs of both parties
- Recapitulative statement (EC Sales List) to the BZSt
Retention periods
| Document | Retention period | Note |
|---|---|---|
| BZSt confirmation letter | 10 years | Keep the original |
| VIES query (screenshot) | 10 years | Digital storage permissible |
| Invoices | 10 years | Archive in GoBD-compliant manner |
| Proofs of arrival | 10 years | Original or certified copy |
| CMR consignment notes | 10 years | For freight shipments |
Consequences of missing or incorrect verification
The consequences of omitted or inadequate VAT ID verification can be existentially threatening for car dealers:
Tax consequences
- Retroactive VAT assessment: The tax office levies 19 % VAT on all affected supplies – retroactively
- Interest on tax back-payments: 0.5 % per month (6 % per year) pursuant to § 233a AO
- Loss of good-faith protection: Without proof of verification, no protection against liability
- Penalty surcharges: In case of intentional conduct, additional sanctions may apply
Calculation example for car dealers
| Scenario | Amount |
|---|---|
| 10 vehicles at 40,000 € net sold to EU partner | 400,000 € revenue |
| VAT back-payment (19 %) | 76,000 € |
| Interest (estimated, 2 years retroactive) | ~ 9,120 € |
| Tax advisor costs for appeal | ~ 3,000–5,000 € |
| Total risk | ~ 88,120–90,120 € |
Special considerations for car dealers
The vehicle trade brings specific challenges that go beyond general verification obligations.
EU vehicle import
When importing vehicles from EU countries, you must not only verify the supplier’s VAT ID but also ensure that the correct taxation is applied. The distinction between the following is crucial:
- Standard taxation: The supplier issues a net invoice, you carry out acquisition taxation
- Margin taxation: The supplier only taxes their trade margin – acquisition taxation does not apply here, but VAT ID verification remains necessary
- New vehicles (§ 1b UStG): Special regulations, as even private individuals may be subject to acquisition tax
B2B sales to EU countries
When selling vehicles to commercial customers in other EU countries, VAT ID verification is the fundamental prerequisite for tax-free delivery. Additionally, note:
- The VAT ID must be shown on the invoice (yours and the buyer’s)
- Transport must demonstrably take place to another member state
- Reporting in the recapitulative statement (EC Sales List) is mandatory
- For pickup transactions: special care with identity verification
Triangular and chain transactions
In vehicle trading, constellations involving three or more parties are common. In such triangular or chain transactions, you must verify the VAT ID of all parties involved. The assignment of the moving supply determines who has which tax obligations.
How AutoPult automates VIES verification
Manually verifying every VAT ID costs time and is error-prone. AutoPult integrates VAT ID verification directly into your workflow:
Automatic verification when creating a contact
As soon as you create a new business partner in AutoPult and enter a VAT ID, the system automatically performs a VIES query. If the number is invalid, you are immediately warned – before you even close a deal.
Regular repeat verification
AutoPult automatically re-verifies the VAT IDs of your existing business partners at regular intervals. If a VAT ID becomes invalid, you receive a notification and can react before a delivery takes place.
Complete documentation
Every verification is automatically documented with timestamp, result, and assignment to the business transaction. During a tax audit, you can export all records in just a few clicks – complete and audit-proof.
Integration with DATEV
The verification results flow seamlessly into the DATEV export. This way, you and your tax advisor always have a complete overview of all verified VAT IDs and their status.
Time savings: AutoPult users report that they save an average of 2–3 hours per week through automated VAT ID verification – time they can instead invest in their core business. Try the VAT ID verifier for free.
Frequently Asked Questions (FAQ)
What happens if the VIES query does not work?
VIES depends on the uptime of national databases. If a country service is temporarily unavailable, try again later or use the direct BZSt query. Document the outage and your renewed attempt. Alternatively, you can request the query in writing from the BZSt.
How often must I verify the VAT ID of a regular customer?
There is no legally fixed deadline for repeat verifications. However, the tax authorities expect you to perform at least a simple query for every transaction. For regular customers, a qualified query every 3–6 months is recommended, as well as a simple verification before every delivery.
Does the verification obligation also apply to margin taxation?
Yes. Even if no acquisition taxation occurs for the buyer with margin-taxed deliveries, you should still verify the VAT ID. This serves your own protection and the correct tax classification of the transaction. This becomes particularly relevant when you switch between margin taxation and standard taxation.
Can I have the VAT ID verified by phone at the BZSt?
Yes, the BZSt offers telephone verification at +49 228 406-1222. However, the result is not documented – for good-faith protection, you need written confirmation. The telephone query is therefore only suitable as a quick check.
What should I do if my customer’s VAT ID is invalid?
Under no circumstances should you carry out a tax-free delivery. Clarify with the customer whether the VAT ID is correct or whether they need to apply for a new one. If no valid VAT ID can be presented, you must invoice the delivery with German VAT.
Must I also verify the VAT ID for pickup transactions?
Yes – for pickup transactions, the verification obligation is particularly important, as this type of transaction carries an elevated fraud risk. Additionally verify the identity of the person picking up using identification documents and authorizations.
How long does the qualified query at the BZSt take?
The online query is usually answered immediately. The official confirmation letter by mail typically arrives within 5–10 business days. Plan this timeframe into your business process.
Conclusion: VAT ID verification is mandatory – not optional
For car dealers with EU business, consistent verification of the VAT identification number is non-negotiable. The risks of omitted verification – VAT back-payment, interest, and loss of good-faith protection – are disproportionate to the manageable effort of a proper VIES query.
- Always verify with a qualified query – a simple query alone is not sufficient for vehicle transactions
- Document thoroughly – BZSt confirmation letters are your strongest evidence
- Use automation – tools like AutoPult save time and reduce errors
- Re-verify regularly – VAT IDs can become invalid at any time
Next step: Try the free VAT ID verifier from AutoPult and secure your EU transactions – fast, reliable, and documented.
