Please check with other members of your family and neighbors to see if one of them could have received it and put it in your house. It also could still be at your local post office awaiting your pickup. You may also contact USPS to officially put them on notice and let them know that your package was never delivered providing them with the tracking number. Just dial 1-800-ASK-USPS or contact your local Post Office. This has to be done by you at the delivery address and they will start a Postal Investigation as postal theft is a federal crime and they do investigate your claim.