Vatigo – EU VAT & UID Validator for Contact Form 7, WPForms & Fluent Forms

Vatigo checks EU VAT identification numbers directly in your WordPress forms – no coding, no API key, no configuration. Install, activate, add the field. Done.

Built for B2B forms: contact and quote requests, dealer and partner registrations, wholesale sign-ups, event registrations with company invoicing – anywhere you need a correctly formatted VAT ID before the form is submitted.

Works with Contact Form 7, WPForms and Fluent Forms.

Why Vatigo?

• Catches typos before they reach your inbox – no more “ATU1234567” (one digit short) or “DE 123 456 78” in your invoices
• All 27 EU member states with country-specific format rules
• Tolerant input – spaces, dots, dashes and lowercase letters are normalized automatically (atu 1234-5678 → ATU12345678)
• Helpful error messages – the user sees exactly which country format is expected, including an example
• Real-time inline feedback while typing (WPForms)
• Server-side validation on every submission – works even with JavaScript disabled
• 100 % offline – no external requests, no tracking, nothing leaves your server
• GDPR-friendly – VAT IDs are validated in memory and never stored
• Custom error messages via the settings page
• Developer-friendly – add any other form plugin through a simple integration API

Supported countries and VAT ID formats

• Austria – UID-Nummer – ATU12345678
• Belgium – BTW / n° TVA – BE0123456789 or BE1123456789
• Bulgaria – ДДС номер – BG123456789
• Croatia – PDV ID – HR12345678901
• Cyprus – ΦΠΑ – CY12345678A
• Czech Republic – DIČ – CZ12345678
• Denmark – CVR / moms – DK12345678
• Estonia – KMKR – EE123456789
• Finland – ALV-numero – FI12345678
• France – numéro de TVA intracommunautaire – FRXX123456789
• Germany – USt-IdNr. – DE123456789
• Greece – ΑΦΜ – EL123456789
• Hungary – közösségi adószám – HU12345678
• Ireland – VAT number – IE1234567A
• Italy – Partita IVA – IT12345678901
• Latvia – PVN – LV12345678901
• Lithuania – PVM kodas – LT123456789
• Luxembourg – n° TVA – LU12345678
• Malta – VAT number – MT12345678
• Netherlands – btw-id – NL123456789B01
• Poland – NIP – PL1234567890
• Portugal – NIF – PT123456789
• Romania – CIF / CUI – RO12345678
• Slovakia – IČ DPH – SK1234567890
• Slovenia – ID za DDV – SI12345678
• Spain – NIF / CIF – ESA12345678
• Sweden – momsregistreringsnummer – SE123456789012

Contact Form 7: EU VAT ID field

Add the uid_vat form tag to your form template:

[uid_vat uid-field] – optional field
[uid_vat* uid-field] – required field

With placeholder:

[uid_vat* eu-vat-id placeholder "e.g. ATU12345678"]

Required validation uses the Contact Form 7 Schema-Woven Validation (CF7 5.6+).

WPForms: EU VAT ID field

Drag the EU VAT ID field from the field panel into your form. It supports required validation, custom labels, placeholder text and real-time inline feedback while the user types.

Fluent Forms: EU VAT ID field

Drag the EU VAT ID field from the General Fields section into your form.

Styling the inline feedback

The real-time feedback (WPForms) uses the class .vatigo-feedback. To hide it, add this to your theme’s CSS:

.vatigo-feedback { display: none; }

For developers

Register an integration for any other form plugin:

add_action( 'vatigo_register_integrations', function( $manager ) {
    $manager->register( new My_Custom_Integration() );
} );

Your class must extend Vatigo_Integration_Base and implement all abstract methods. The settings page shows a complete example.

Coming in Vatigo Pro

• Live validation against the official EU VIES database (checks whether the VAT number actually exists)
• More features for B2B workflows

1. In your WordPress admin, go to Plugins → Add New and search for “Vatigo”.
2. Click Install Now, then Activate.
3. Go to Settings → EU VAT Validator and enable the integrations for the form plugins you use.
4. Add the EU VAT ID field to your form (see the instructions for your form plugin above).

1. 

   Settings page – enable the EU VAT validation for Contact Form 7, WPForms and Fluent Forms

2. 

   EU VAT ID field in a WPForms contact form

3. 

   Required field validation for the VAT ID field

4. 

   Format validation – clear error message with an example of the expected VAT ID format

1.0.3

• New: WPForms – the EU VAT ID field can now be mapped in Marketing integrations (e.g. Make, Zapier, Webhooks, Mailchimp) and other field mapping dropdowns

1.0.2

• Fix: Belgian VAT numbers starting with 1 (issued since 2023) are now accepted

1.0.1

• Tested with WordPress 7.0
• Improved plugin description and documentation

1.0.0

• Initial release
• Contact Form 7 integration with SWV required validation support (CF7 5.6+)
• WPForms integration with real-time inline feedback
• Fluent Forms integration
• Pattern validation for all 27 EU member states
• Admin settings page with integration toggle and hook reference
• Custom error message override
• Extensible integration API