About 5 years ago I had my mail returned for insufficient postage. The price of a stamp had risen a penny and I didn't know about it.
I think everyone here knows what happens when you have a late pay on your credit card. (Fortunately my CC company was understanding and I didn't incur their wrath)
Since then I have been paying my bills online and only receive junk mail, so much that I can't believe that the conservationists aren't foaming at the mouth.
Good bye USPS, it can't happen soon enough for me.
USPS