Hey,
Sorry i’ve pasted the wrong website, fixed in this message.

From my dev:

I tried to add new custom checkout validation using this
add_action(‘woocommerce_checkout_process’, function(){
wc_add_notice( __( ‘Please enter something into this new shiny field.’ ), ‘error’ );
});

This little sniplet should throw out error when trying to place order, but it didn’t

the message it should give him is that:

https://docs.woocommerce.com/wp-content/uploads/2012/04/WooCommerce-Codex-Checkout-Field-Notice.png

So pretty much these are the instructions:

1) He added the hook to functions.php
2) Tried to initiate it when going to checkout
3) not working