Gravity Forms IBAN validation

This add-on for Gravity Forms adds the option to validate if the users’ input is a valid IBAN bank account number.
The check is done when the user submits the form and it will show an error if the input is not correct. Only if this error is resolved the form can be actually be submitted.

In case of an invalid IBAN account number, the default Gravity Forms error message will be displayed in the language that Gravity Forms is set up in.

By installing this plugin besides Gravity Forms (premium plugin) you will be able validate IBAN account numbers through two ways:

  1. Apply a IBAN mask to existing fields
    You can apply a IBAN mask to regular text input fields that are already set up in your form. The mask will show as a placeholder inside the input element (eg. [____ ____ ____ __]). It validates the account number when submitting the form.
  2. Add a new IBAN input field to your form
    You can add a new field to your form. It validates the account number when submitting the form.


  • Standard field

  • Advanced field


  1. First install Gravity Forms.
  2. In the WordPress admin panel, go to [Plugins] in the left navigation menu.
  3. Click the [Add New] button and upload the plugin (.zip file)
  4. Activate the plugin
  5. Create a Gravity Form
    • Add or edit a standard field [Single Line Text]
      • Check the “Input Mask” option
      • Select IBAN from the dropdown menu
    • Or; Add an advanced field [IBAN]


You just might want to validate a IBAN account in a Gravity Form, or help the visitor ensure he filled in his IBAN number correctly. Let us help you do so!