- This may happen for multiple reasons. The carrier may have accidentally dropped it off next door. Kindly ask your neighbor.- There is a delay in the carrier’s system, and it is still actually on its way to you. Check your mailbox again in 48 hours, please.- Sikacci is not responsible for any lost or missing packages. We provide each order with a secure tracking number, to ensure safe and tracked deliveries. It is in the customer’s responsibility to keep an eye on this tracking number until item is safely received.