Signature requirements depend on the type of product being shipped and the value of your item. All orders above $250 will be shipped with signature-confirmation so these packages will require a person to physically sign for the package in order for it to be safely delivered. This means that someone needs to be available to receive the delivery. If you are not home when delivery is attempted, they will leave a notice on how to contact them to reschedule delivery much like any other package you order online.
Orders under $250 will be left in a safe location determined by the respective USPS or FedEx employee at the delivery address. If you are concerned about the safety of your delivery, please make sure you have your package shipped to a daytime address where you can safely receive it yourself.