Plugin · no coding required
Postcode check for Contact Form 7
Do you ask for addresses in a form on your WordPress site, for example for a quote request, appointment or registration? With the Contact Form 7 plugin, visitors only enter their postcode and house number. The street and city are filled in automatically.
Version 2.1.2 · updated on 07-05-2026 · developed by Postcode Checkout
Your address
Street and city filled in automatically
Why address validation in your Contact Form 7 forms?
Correct addresses with every request
Quote requests, service appointments and registrations come in with an existing address. No more calling back to check a house number or street name.
Less typing for visitors
A short form gets filled in more often. Visitors fill in two fields and immediately see whether their address is correct.
Usable data in your inbox or CRM
Addresses come in with a consistent format, so you can process them in your planning, CRM or administration without manual work.
What do you need?
The Contact Form 7 plugin is developed and maintained by our partner Postcode Checkout. The address data comes from Nederland Postcode API. That is why you need a subscription with both.
Nederland Postcode API
For the address data
- 10+ million addresses
- From just €59.99 per year
- Unlimited websites and webshops
- Test for free with a test API key
Postcode Checkout
For the Contact Form 7 plugin
- Ready-made Contact Form 7 plugin
- Updates and installation support
- License per number of websites
- Free trial period
Frequently asked questions about the Contact Form 7 plugin
- Do I need a webshop to use this plugin?
- No. The Contact Form 7 plugin works in regular forms on your WordPress site, such as contact, quote or sign-up forms. If you also have a WooCommerce webshop, there is a separate plugin for the checkout.
- What does the Contact Form 7 plugin cost?
- You pay for two things: a subscription at Nederland Postcode API for the address data, from €59.99 per year for an unlimited number of websites, and a license at Postcode Checkout for the Contact Form 7 plugin itself. You can find the current license prices on the Postcode Checkout website.
- Can I test the Contact Form 7 plugin for free?
- Yes. With a free account at Nederland Postcode API you get a test API key that works for postcodes starting with 1012, 1015 or 1118. Postcode Checkout offers a free trial period for the Contact Form 7 plugin. That way you can test everything before you pay.
- Can I use one subscription for multiple websites?
- Your Nederland Postcode API subscription covers an unlimited number of websites and webshops, including client projects. The Postcode Checkout license depends on the number of websites you install the Contact Form 7 plugin on.
- What happens when I reach my limit?
- You receive an email at 80%, 90% and 100% of your monthly limit. At 100%, new requests are rejected until the start of next month. You never pay extra for requests above your limit.
Ready to add address validation?
Create a free account, test with your test API key and only pay when you go live.
