Add a Checkbox-Type Field to Checkout using Register Helper

User Profile Field settings in Paid Memberships Pro offers many custom field types that you can use to add fields to checkout, member profiles, or

How to Add Auto Populate Field in WordPress Form

Payment Field in Fluent Forms - WP Manage Ninja

How to parse MS Forms checkboxes in Flow in order - Power Platform Community

Add Custom Checkbox Fields on Checkout Page - Arrow Design

MC4WP: Mailchimp for WordPress – WordPress plugin

How to Add Custom Checkbox to WooCommerce Checkout Page

Viedoc Designer User Guide, Using JavaScript in Viedoc

Salesforce Checkbox Default Value - SalesForce FAQs

How to add custom check boxes fields above the terms and conditions in WooCommerce checkout?, by Shahzaib Khan

Adding Accept Terms Checkbox to WordPress Registration Form - ProfilePress