How to make Woocommerce checkout field not required if checkbox is checked?

Solution:

I have done this:

add_filter( 'woocommerce_checkout_fields' , 'company_checkbox_and_new_checkout_fields_1', 9999 );
function company_checkbox_and_new_checkout_fields_1( $fields ) {
        if (isset($_POST['buy_on_company'])) {          
            $fields['billing']['billing_name']['required'] = false;
            } else {
            $fields['billing']['billing_name']['required'] = true;  
        }
return $fields;
}

Now it doesn’t ask for billing name field.