Make the Order Notes field required in the WooCommerce Checkout

order-notes-required.php

// Place this code in your theme's functions.php file

// Hook in
add_filter( 'woocommerce_checkout_fields' , 'custom_override_checkout_fields' );

// Our hooked in function - $fields is passed via the filter!
function custom_override_checkout_fields( $fields ) {
     $fields['order']['order_comments']['required'] = true;
     return $fields;
}

Any chance to change place holder text?

Any chance to change place holder text?

this would help. https://gist.github.com/13122310958/48690a4adec05e50acd8b51011e23de5