add_action('woocommerce_thankyou','auto_complete_woocommerce_order');function auto_complete_woocommerce_order($order_id){if (! $order_id){return}$order=wc_get_order($order_id);$order->update_status('completed')}The final code will look something like this. add_action('woocommerce_thankyou','auto_complete_woocommerce_order');function auto_complete_woocommerce_order($order_id){if (! $order_id){return}$order=wc_get_order($order_id);$order->update_status('completed');