Commerce v1 Modules Address Validation EUVat Validator

The EU VAT Validator module can be used to accept and validate EU VAT Registration Numbers as well as VAT Registration Numbers in the United Kingdom. This talks directly to the official VIES Web Service from the European Union. As of Commerce v1.2.0-rc3, United Kingdom registration numbers are validated against the HMRC VAT Registration API and validation against VIES will no longer work.

When combined with the EUVat module this can be used for the Reverse Charge mechanism. See the EUVat documention for more information about that.


For validation of VAT numbers in the European Union, no properties are needed.

For validation of VAT numbers in the United Kingdom, you will need to authenticate with the HMRC Developer Hub, and provide the following credentials in the module:

  • Client ID
  • Client Secret
  • If you've provided sandbox credentials and want to verify the integration with fake verification numbers, enable the Use Sandbox property.

See the section at the bottom of this page on how to get set up with a HMRC account and generationg your credentials.

Template Changes

In order to use the EU VAT Validator module, you'll need a field to the address with the key vat_registration. That's already included for you by default in frontend/checkout/partial/billing-address-fields.twig:

<div class="c-field {% if error_billing_vat_registration %}error{% endif %}">
    <label for="address-billing-vat-registration">{{ lex('commerce.vat_registration') }} <small>{{ lex('commerce.address.optional') }}</small></label>
    <input type="text" name="address[billing][properties][vat_registration]" id="address-billing-vat-registration" value="{{ address_billing_properties.vat_registration }}">
    {% if error_billing_vat_registration %}<span class="c-field-error">{{ error_billing_vat_registration }}</span>{% endif %}

Technically the VAT Registration belongs to the billing address, but if you've adjusted things so that the customer only sees the shipping address and want to accept it there instead, you may add the following in frontend/checkout/partial/shipping-address-fields.twig instead:

<div class="c-field {% if error_shipping_vat_registration %}error{% endif %}">
    <label for="address-shipping-company">{{ lex('commerce.vat_registration') }} <small>{{ lex('commerce.address.optional') }}</small></label>
    <input type="text" name="address[shipping][properties][vat_registration]" id="address-shipping-vat-registration" value="{{ address_shipping_properties.vat_registration }}">
    {% if error_shipping_vat_registration %}<span class="c-field-error">{{ error_shipping_vat_registration }}</span>{% endif %}

HMRC Application & Credentials

HMRC requires VAT number verification requests to be authenticated, so you'll need to start by registering a developer account or signing in to the HMRC Developer Hub.

In your account, choose to either create a Sandbox or Production application. For testing purposes, the sandbox can be used immediately while the production usage requires HMRC approval.

For sandbox credentials:

  1. Choose "Add an application to the sandbox" in the menu. Enter a name.
  2. When asked which APIs you want to use, find "Check a UK VAT Number" and enable 1.0(Beta). At the bottom click Add your application.
  3. Click "View application credentials" and continue through the next step. C
  4. Copy the Client ID when shown, storing it somewhere safe or directly copying it into the Commerce module. Click continue.
  5. Click "Generate a client secret". The secret is only provided once. Copy it and store it somewhere safe. Paste it into the Commerce module.
  6. In the module configuration, make sure to enable the Use Sandbox checkbox.
  7. Use mock VAT registration numbers provided by HMRC on GitHub in your testing.

For production credentials:

  1. Choose "Get production credentials" in the menu. Enter a name.
  2. You're presented with a checklist of things to do. Go through each of the steps: a. In "Confirm the APIs your application uses", enable "Check a UK VAT number" version 1.0. b. In "Who to contact about your application" and "Tell us your team members" enter the requested contact information. c. In "Confirm the name of your software", you can change your application name if you'd like. Confirm it otherwise. d. In the "Your responsibilities" section, answer the questions. It is not necessary to have a dedicated privacy policy and Terms of Conditions (and all validations stay local on your own server), but you may choose to link to the terms of your shop. e. Agree to the terms of use.
  3. Click "Check Your Answers" to get a summary of what you've provided, and continue to request approval.
  4. Once your application has been approved, you'll be provided with the Client ID and Client Secret to use. Paste those into the Commerce module, and make sure Use Sandbox is unchecked.