20090816

48. YOU CAN MAIL LETTERS FOR LITTLE OR NO COST

I may never receive another piece of mail, but I have to let you in on a secret: It's possible to send letters for free or for well below current postage rates. Information on beating the postal system has been floating around for decades, but it wasn't gathered in one place until outlaw publisher Loom panics put forth How to Screw the Post Office by "Mr. Unzip" in 2000. Not content to theorize from an ivory tower, Unzip put these methods through the ultimate real-world test: He mailed letters. He also examined the envelopes in which hundreds upon hundreds of customers had paid their utility bills. Based on this, he offers proof that letters with insufficient postage often make it to their destinations.
The key is that the machines which scan for stamps work incredibly fast, processing ten letters per second. They're also fairly unsophisticated in their detection methods, relying mainly on stamps' glossy coating as a signal. Because of this, it's possible to successfully use lower-rate stamps, including outdated stamps, postcard stamps, and even 1-cent stamps. Beyond that, Unzip successfully sent letters affixed with only the perforated edges from a block of stamps. Even those pseudo stamps sent by charities like Easter Seals or environ-mental groups can fool the scanners.
Another approach is to cut stamps in half, using each portion as full postage. Not only does this give you two stamps for the price of one, but you can often salvage the uncancelled portion of stamps on letters you receive. In fact, the author shows that sometimes the Post Office processes stamps that have already been fully cancelled. This happens more often when the ink is light, but even dark cancellation marks aren't necessarily a deal-breaker. Then there's the biggie, the Post Office's atomic secret that lets you mail letters for free. Say you're sending a letter to dear old mom. Simply put mom's address as the return address. Then write your address in the center of the envelope, where you'd normally put hers. Forget about the stamp. The letter will be "returned" to her for insufficient postage.
Unzip covers further techniques involving stamp positioning, metered mail, 2-cent stamps, and other tricks. Except perhaps for the reversed address scam, none of these tricks will guarantee your missive gets to its destination, so you wouldn't want to try them with important letters. But if you want to save a few cents once in a while — or more likely, you want to have fun hacking the postal system — it can be done.

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