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It's more complicated than that. The last line has to match two out of three (for example, city and ZIP), and then it can try to do some reverse analysis on what you've written for the address line. (Even that's an oversimplification; it's pretty darn impressive.) The USPS also has the additional challenge of matching what you think is your address with what is actually your address. Very, very few people know their…
The USPS also has the additional challenge of matching what you think is your address with what is actually your address. Very, very few people know their address. What parts of their addresses do people typically get wrong? Where can one go to find one's actual address?
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