The main post office in the area i'm in is swamped on Saturday.It is in the area where the courthouse processes 5B and 5C. What they do is have a special set up like on income tax deadline day. They have special containersthat are hourly emptied and quickly looked over on the outside for the loss of the unit sticker.If you hang around and yours falls off they put it in a bin with your name on a puter TV so you can repair it. they recieve over 130,000 there in a weekend