I sent it to the PO Box and this is what came up on the tracking:
We attempted to deliver your item at 7:46 AM on January 10, 2009 in CROSS PLAINS, WI 53528 and a notice was left. It can be redelivered or picked up at the Post Office. If the item is unclaimed, it will be returned to the sender. Information, if available, is updated every evening. Please check again later.