If your parcel cannot be delivered for some reason, the Australia Post courier will leave a calling card for you to reschedule your delivery at your convenience. We will provide a tracking number to you via email the day your order is dispatched so that you know where your parcel is at all times ( Please note delivery to PO Boxes are not able to have tracking). Should your item not arrive within the estimated delivery time please contact our customer service team via email at sales@cliponearrings.net.au