I'll answer your question! I have had a pkg on the truck out for delivery and it wasn't due till the next day. It rode around in the truck and went back to the hub. And, then it did come the next day.

If it does come today, just tell them you weren't expecting it until tomorrow and you will have the COD ready tomorrow when they bring it. I believe they will attempt to deliver a pkg 3 times before they send it back to the shipper.