We suggest that if you won't be home when a package is delivered, consider having your order shipped to your office, apartment complex delivery office, or a store/post office for pick up. You can also sign up for UPS Delivery Manager to schedule deliveries, arrange pick-up locations and set up delivery notifications.
If you suspect that your package has been stolen, please contact your local police department to file a police report.
You can also contact the delivery carrier to inquire about the delivery and/or file a claim. Sometimes the package is misplaced or marked delivered a day or two before actually being delivered to you.
Another pro tip: Check your credit card for something called "purchase protection." In some cases, if your stuff is damaged or stolen, your credit card company will refund you.