IBAN for Contact Form 7 WP Registry grade A. No security issues foundWP RegistryNo security issues foundOpen the reportA

A WordPress plugin that adds an IBAN (International Bank Account Number) form field to Contact Form 7. It provides automatic input formatting and full server-side validation including country-specific format checks and checksum verification.

Features

Form Tag Generator

Adds an "IBAN" button to the Contact Form 7 editor toolbar. Click it to generate a properly configured IBAN field — no need to remember the tag syntax.

Input Formatter

Automatically formats user input on blur:

• Converts to uppercase
• Strips invalid characters
• Inserts a space every 4 characters for readability

Validation

Validates submitted IBANs server-side using the php-iban library:

• Country code and length checks
• IBAN checksum verification (MOD-97)
• Blocks form submission with a configurable error message on invalid input

Usage

In the Contact Form 7 editor, use the tag generator button or add the tag manually:

[iban your-iban]     # optional field
[iban* your-iban]    # required field

In your mail template, use [your-iban] to include the submitted value.

Installation

1. Download the latest release or clone this repository into wp-content/plugins/.
2. Activate the plugin in Plugins > Installed Plugins.
3. Ensure Contact Form 7 is installed and active.

Requirements

FAQ

How do I customize the error message?

Go to your form's Messages tab in the CF7 editor and find the "Invalid IBAN" field.

Can I style the IBAN input field?

Yes — the input has the CSS class wpcf7-iban. Target it with .wpcf7-iban in your stylesheet.

Is it safe to deactivate?

Yes. Existing forms will retain the [iban] tag in their configuration but the field won't render until the plugin is reactivated. No data is lost.

Changelog

1.1

• Aligned with Contact Form 7 6.0 tag-generator design
• Isolated php-iban into a separate namespace
• Tested with CF7 6.1.5 and WordPress 6.9

1.0

• Initial release with php-iban 4.2.3

Credits

IBAN validation is powered by the php-iban library (v4.2.3) by globalcitizen, licensed under LGPLv3.

License

This plugin is licensed under the GNU General Public License v2.0 or later.