I had to get something mailed to the government by today (the last day of february). I asked the clerk to post mark two stamped (1 ounce, just a 41-cent stamp on each) envelopes for today -- something that would take all of 5 seconds to do. He said I had to pay something like $1.10 for each envelope for a proof of mailing, that that was the only way he would post mark them for me!

Robert