Kowsar Hossain

If you want to make coupon code as a required field, this plugin will help.
During checkout when a customer will try to place an order without entering any coupon code, checkout process will be interrupted and customer will see an error notice.
You can configure the error notice text from “WooCommerce>Force Coupon” menu from admin panel.

Force Coupon for WooCommerce

A lightweight WooCommerce based plugin to force the customer to enter a coupon code during checkout

rc183

A plugin to force buddypress users to complete the required fields of their profiles. 
Each users with a non complete profile are redirecting to their profile page and a notice is displayed with the required fields. 
Multilanguages : English, French and Danish (Thanks to Ronnie Skansing).

Bp Force Profile

A plugin to force buddypress users to complete the required fields of their profiles

Force Coupon for WooCommerce vs Bp Force Profile