What is VAT validation?

VAT validation is the process of checking whether a customer’s VAT (Value Added Tax) registration number is valid.

Businesses use VAT validation to:

• Confirm that a VAT number belongs to a registered business
• Verify customer eligibility for VAT-related exemptions or reverse-charge treatment
• Reduce errors in tax calculations and invoicing
• Maintain accurate tax records

For international ecommerce, VAT validation helps merchants apply the correct tax treatment when selling to businesses in regions such as the European Union where VAT rules apply.