If you are purchasing for a client and wanting the package to be delivered directly to their address, simply enter your desired shipping address in check-out. Then when you get to the payment portion of the order, there is a checkbox referring to the billing address, 'Same as shipping address.' You can uncheck this and it will open up a separate field where you can enter a different address for the billing info.
We never include any pricing or invoice information in our packages. The package will only contain a packing slip with a list of items in the order.