The U.S. Postal Service is about the best in the world at providing its core service of mail delivery. In fact, its ability to deliver mail and return undeliverable mail to the sender effectively makes the United States government one of the most efficient in the world, according to a working paper by National Bureau of Economic Research.
More than 40 million Americans change their address each year, which means the U.S. Postal Service forwards an awful lot of mail. In fiscal year 2010, it forwarded 1.2 billion pieces. Under the Postal Service’s regulations, customers who fill out a change of address form have their mail forwarded to their new address for 12 months after the move. Mail forwarding costs the Postal Service almost $300 million a year. The cost to return mail to sender is another $800 million.