I've pre signed for deliveries from Apple before without any problems. However, I have a small, enclosed front porch for the deliveries to be left on - out of sight of of any passers by. So, taking that into account I'd recommend you taking a look at your immediate surroundings and asking yourself how comfortable you would feel having a valuable package left sitting there unattended for a certain period of time. If you feel comfortable with the location/surrounding - go ahead and pre sign for the delivery, leaving the signed slip in a prominent location for the driver to find. If possible maybe you could have a neighbor, or friend, keep an eye out for the delivery and/or package and have them pick it up for you. If you're not comfortable with this, then waiting for a second delivery attempt, or making other arrangements for getting your package from the currier would probably better suite your needs, imo.