I haven't done pre-signed before but I'm going to try it tomorrow. My neighborhood seems pretty safe (I hope). I'm willing to take a chance because I'll be going out in the afternoon. I will hold the sign until I go out but I'm hoping UPS will be early.
Good luck with your pre signing for your delivery, and here's to hoping that everything works out for you
...meaning that that new iPhone goodness will be waiting for you when you get home, and your enjoyment of it upon your getting it
As well, I've also done the 'waiting to post/hang the signed slip until the last possible moment' thing myself and I think that that is a prudent thing to do - no need to give anyone any advanced notice of what is in the offing. Especially when you're waiting for a valuable package to be delivered. Again, may everything go according to plan for you tomorrow, and, here's to you enjoying your new 'Precious'