Custom checkout error messages for required fields?

Hi All,

I was able to make the Notes a required field using the woocommerce_checkout_fields filter, but the generic error message comes up when it’s left blank:

“Order Notes is a required field.”

I would like to replace this with my own custom message, and found this script which I thought would do the trick:

function my_woocommerce_add_error( $error ) {
    if( 'Order Notes is a required field.' == $error ) {
        $error = 'The shiny brand new error message';
    }
    return $error;
}
add_filter( 'woocommerce_add_error', 'my_woocommerce_add_error' );

No luck – I tried with and without the period in the message. I have several input fields that will need error message customizations as well (like the phone number). Any help would be greatly appreciated.

Thanks,
-Ben

https://www.ads-software.com/plugins/woocommerce/