A leave my delivery tag or ATL tag is a small metallic barcode that will be installed at a safe location of your choosing on your property or premise where you would like to have all deliveries left (e.g., by the backdoor, under the deck). A small metallic barcode will be installed there, which your courier scans when leaving items to show in our tracking system they've been delivered. All deliveries will then be left at this location in the future.