You can contact the buyer to tell him that the product is out of stock. Can you cancel the order? Cancelling the order requires the buyer's operation, but you must tell the buyer not to choose the seller's reason, otherwise the two orders will be completed but not sold. If you can contact the buyer to tell him that the product is out of stock, can you cancel the order? Cancelling the order requires the buyer's operation, but you must tell the buyer not to choose the seller's reason, otherwise the two orders will be completed but not sold. If the product is not sold, you may not have any orders for a month. If the product is not sold, you may not have any orders for a month.