If you are linking directly to print views of coupons and would like to show a message that a coupon has expired you can use the following snippet to add a message after the coupon is expired instead of showing a blank page.

Add the following coding to a custom plugin or to your child theme’s function.php:

/*
*	Coupon Creator - Add Expired Message to Print Coupons
*	Version 2.1.2
*/
add_action('cctor_print_no_show_coupon', 'cctor_expired_message' );
function cctor_expired_message() {
	
	echo '<h3>Sorry, this coupon has expired.</h3>';
	
}