Before contacting us we recommend looking all over your property as the shipping carrier may have left your package in a safe location away from the view of the public.
If you live in an apartment complex, your package may have been delivered to a parcel locker (you should have been given a key by the USPS to access the locker) or to the Leasing or complex Manager's Office.
Also note that especially during holiday times, shippers may show a package as delivered a few hours or day before it actually arrives.