Multiple Customer Emails.

Hi,

This is not easily possible currently without customization. You can try following code snippet by putting into the active theme’s functions.php file or creating a snippet using Code Snippets plugin from the backend:

add_action('wpinv_post_send_invoice_notification', 'send_user_invoice_mail_cc', 10, 2);
function send_user_invoice_mail_cc($invoice, $email_type){
	if(isset($email_type) && 'user_invoice' != $email_type){
		return false;
	}

	if ( empty( $invoice ) ) {
		return false;
	}

	$invoice_id = $invoice->ID;

	$recipient  = 'abc@mycompany.com, xyz@mycompany.com'; //change to your CC email addresses
	$subject        = wpinv_email_get_subject( $email_type, $invoice_id, $invoice );
	$email_heading  = wpinv_email_get_heading( $email_type, $invoice_id, $invoice );
	$headers        = wpinv_email_get_headers( $email_type, $invoice_id, $invoice );
	$message_body   = wpinv_email_get_content( $email_type, $invoice_id, $invoice );
	$attachments    = wpinv_email_get_attachments( $email_type, $invoice_id, $invoice );

	$content        = wpinv_get_template_html( 'emails/wpinv-email-' . $email_type . '.php', array(
		'invoice'       => $invoice,
		'email_type'    => $email_type,
		'email_heading' => $email_heading,
		'sent_to_admin' => false,
		'plain_text'    => false,
		'message_body'  => $message_body,
	) );

	return wpinv_mail_send( $recipient, $subject, $content, $headers, $attachments );
}

This will send another email with the same content to given recipient addresses. Don’t forget to change the email address from ‘abc@mycompany.com, xyz@mycompany.com‘ to your email addresses. You can add a comma-separated list of email addresses. Let me know if it helps or not.

Regards,
Patrik