Contact Form plugin from www.123formulier.nl
Creating a form
Publishing the form
a. In the Publish section (no 4 from above) go to the WordPress section of the page, select the code, and copy it to the clipboard (by pressing CTRL+C).
b. Paste the code (by pressing CTRL+V) in the WordPress page where you want the form to appear and save the post.
a. After plugin installation and activation, visit My Account section on 123Formulier. In Account details spot the API key field and press Generate. Copy the API key received.
b. In the WordPress dashboard, while editing the page in the Visual mode, click on the 123Formulier icon in the menu. Paste the API key there, press Connect and then choose the form that you want to publish (if you have built several forms you can include as many of them as you want). Press Embed and view the result.