For those who have a challenge (Postal worker) at the PO and they have the automated machine...Use it! There is no one to argue with and you just put your machine generated stamp on the FRE and drop it into the box! As long as you have the machine generate the stamp, there shouldn't be a problem! Of course, for those who live in areas where there isn't one of those machines, well enjoy living in a small town! I sometimes wish I did!