Check your mailbox, parcel locker, porch, reception area and other safe locations around the property. Ask household members, neighbours or building staff whether they accepted the package.
If you still cannot find it, contact your local USPS post office with the tracking number. Ask them to confirm the delivery address, scan location, delivery time and whether the parcel was left with another person. You can also submit a missing-mail request through USPS.
If USPS confirms that the parcel was lost or delivered to the wrong address, contact [email protected] with your order number, tracking number and the response from USPS.