WordPress at a glance
filter is not described

woocommerce_coupon_validate_maximum_amount filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_coupon_validate_maximum_amount', 'filter_function_name_3579', 10, 2 );
function filter_function_name_3579( $coupon_maximum_amount() < $subtotal, $coupon ){
	// filter...

	return $coupon_maximum_amount() < $subtotal;
}
$coupon_maximum_amount() < $subtotal
-
$coupon
-

Where the hook is called

WC_Discounts::validate_coupon_maximum_amount()
woocommerce_coupon_validate_maximum_amount
woocommerce/includes/class-wc-discounts.php 723
if ( $coupon->get_maximum_amount() > 0 && apply_filters( 'woocommerce_coupon_validate_maximum_amount', $coupon->get_maximum_amount() < $subtotal, $coupon ) ) {

Where in WP core the hook is used WooCommerce

Usage not found.