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Replacement Recipient From Order Custom Field On WooCommerce Emails

I created a new field in the checkout part using the a checkout field plugin. This field allows customer to specify a third email address outside of the billing or shipping address. I want to send the order confirmation only to this address and not to the billing part.

After several searches, I used Send Woocommerce Order to email address listed on product page answer code, replacing the order item meta key 'email' by 'billing_email_guest' like:

$email = wc_get_order_item_meta( $item_id, 'billing_email_guest', true );

But it doesn't work. What I am doing wrong?

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Answer

You are not using the correct way as this is about custom order meta data, but not order item meta data.

Try the following instead:

add_filter( 'woocommerce_email_recipient_customer_on_hold_order', 'additional_customer_email_recipient', 10, 2 ); // On hold Order
add_filter( 'woocommerce_email_recipient_customer_processing_order', 'additional_customer_email_recipient', 10, 2 ); // Processing Order
add_filter( 'woocommerce_email_recipient_customer_completed_order', 'additional_customer_email_recipient', 10, 2 ); // Completed Order
function additional_customer_email_recipient( $recipient, $order ) {
    if ( ! is_a( $order, 'WC_Order' ) ) 
        return $recipient;

    $billing_email_guest = $order->get_meta('billing_email_guest');
    if( ! empty($billing_email_guest) ) {
        return $billing_email_guest;
    }

    return $recipient;
}

Code goes in functions.php file of your active child theme (or active theme). It should works.

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source: stackoverflow.com
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