how to format po box

I've received mail this way, but i've heard it's the wrong way to do it, would this still be acceptable?

Jimmy Johns

442 Hoagie shop street

PO Box 7664

Hoagies, MA 74723

all fake information of course, but with 442 hoagie shop street being the address of the post office? I've received mail this way, but was told i shouldnt have the address, and should just have the po box, what do? what does that do if im not supposed to but it's there anyway.


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