The Challenge
An online retailer operating across Europe sold to B2B customers in all 27 EU member states. Correctly applying the VAT exemption for intra-community supplies requires a valid VAT ID from the buyer. Incorrect or invalid IDs regularly led to wrong tax calculations, corrective invoices and frustrated customers.
Our Solution
We integrated real-time VIES validation directly into the ordering process:
Real-Time Validation
Validation at the moment the order is entered:
- VIES query via the official service of the European Commission
- Validation in under 2 seconds
- Automatic detection of the country prefix and format check
- Support for all 27 EU member states plus Northern Ireland (XI)
Smart Tax Logic
Automatic application of the correct tax rules:
- Valid VAT ID → automatic tax exemption (reverse charge)
- Invalid VAT ID → order is charged with local VAT
- Own country → no exemption, national tax is applied
- Non-EU country → export rules
Fallback & Resilience
Reliability even during VIES outages:
- Local cache of the most recent successful validations
- Automatic retry on timeout
- Manual approval queue if VIES is unavailable for an extended period
- Subsequent batch validation of pending checks
The Result
- 98.5% of validations completed in under 2 seconds
- Corrective invoices reduced by 94%
- Fully automatic tax exemption without manual intervention
- Complete audit trail for every single validation