I believe this is from "The Complete Book of Dirty Tricks."
First, go to the library and find some phone books for large cities.
In one of the phone books you should be able to find a person who has
the same name as the target. Then go down to the post office and file
a change of address for the target, forwarding his mail to himself in
a far away city.
If I remember correctly the book states that this is very illegal and
is only included for amusement.
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