Once you have received an order, you print the pick list and pack it with the product. The shipment must then be dispatched within 24 hours (working days) from when you received the order. No advertisement, no invoice or other similar document may be added to/on the shipment – only the picklist should be included.
If you manage your orders via Merchant Center, you should then mark the order as processed once it has been handled and add the appropriate shipping tracking ID. This ensures a great customer experience and reduces inquiries concerning the order status.