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Postcode Checkout – Address Validation | Contact form 7

Postcode Checkout – Address Validation | Contact form 7

0/5 (0 ratings) — active installs Updated Sep 2, 2026
addresscheckoutcontact form 7postcodevalidation
Download v2.1.6
Screenshot 1

This plugin adds postcode and address validation to Contact Form 7, with support for all configuration countries via Postcode.nl (or another provider of your choice). Instantly verify if the provided postcode, street, and house number are valid, reducing incorrect submissions.

Features

✅ Easy to use – Quick setup and seamless integration with Contact Form 7.
✅ Accurate address validation – Verify customer data instantly using reliable postcode sources such as Postcode EU, Pro6PP, Postcode API, Nederland Postcode API and Postcode Connect.
✅ Dutch & international support – Works with national (The Netherlands) and international addresses across: The Netherlands, Belgium, Germany, Luxembourg, Austria, Switzerland, France, United Kingdom, Spain, Denmark, Norway, Finland, and Sweden.
✅ Fully configurable – Adjust validation rules and settings to match your form’s workflow.
✅ Fully functional test environment available – Try it risk-free before choosing your databroker and see how much time you save!

Requirements

⚙️ You can create a free Postcode Checkout account and fully test the plugin before choosing your databroker.
⚙️ This plugin requires an Postcode Checkout license to perform real address validation and autocompletion. Licenses can be puchased at: https://www.postcode-checkout.nl/en/pricing
⚙️ This plugin requires an active postcode database account from one of our supported databrokers (i.e. Postcode EU, Pro6PP, Postcode API, Nederland Postcode API and Postcode Connect)

PostcodeEU
PostcodeAPI
Pro6PP
Nederland Postcode
Postcode Connect

External services

This plugin connects to the following external services:

  1. Postcode Checkout by CodeBrain BV
  • Service URL: Postcode Checkout dashboard
  • Privacy policy: Privacy Policy
  • Terms: Terms and Conditions
  • Purpose: validates the merchant API key and performs international address lookup (suggestions and details) and national addresses. Additionally retrieves the supported countries in case of international Postcode EU or Pro6PP.
  • When requests are sent: when an administrator saves or validates the plugin API key, and when a visitor uses address validation or autocomplete in a Contact Form 7 form where this plugin is enabled.
  • Data sent: the API key in the Authorization header, the site URL in the Referer header, a User-Agent string containing the plugin name and author, and lookup data such as country, search query, postcode, house number, house number addition, selected address identifier, and autocomplete session identifier where applicable.