If you want to disable the emails from being sent to the Admin, you can do so by going to WooCommerce → Settings → Emails and deactivating the emails in ...
More about the different emails that are automatically sent at Email Settings.
You should need check that $order argument is valid instance of the WC_Order Class: add_filter( ...
For whatever reason, WooCommerce is sending an email upon cancelled and failed orders only to the site admin. Now, although there must be a perfectly good ...
Double-check that “Enable this email notification” is ticked for order notifications at WooCommerce > Settings > Emails and select the Processing Order email ...
Order Processing – Sent after a completed payment; contains order details. Order Completed – Sent to customers when their orders are marked ...
Email to Customer. The more orders your shop have, the more failed payments will arrive. WooCommerce handles that pretty badly because it only sends a ...
Processing order – sent to the customer after payment and contains the order details. Completed order – sent to the customer when the order is ...
Buy Cancelled / Failed Order Email for WooCommerce by patrickposner on CodeCanyon. The more orders your shop have, the more failed ...
There are several events that can trigger your custom emails: New Order · Pending Order · Processing Order; Cancelled Order (this guide) ...