Free tool
EU VAT number checker
Validate an EU VAT ID against the official VIES database. Confirm your customer is really VAT-registered before you invoice with reverse charge — an invalid ID invalidates the reverse charge itself, not just the XML.
Same check from the API
Free, no key required — rate-limited per IP:
curl -X POST https://fakturwire.com/public/vat-check \
-H "content-type: application/json" \
-d '{"vatId": "DE123456789"}' Building invoicing? FakturWire runs the VIES check for you at checkout and applies reverse charge automatically. Get an API key with 50 free credits →