What is the 'flag' on a USA mailbox for?

Never seen any mailboxes here with that feature.

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lissah · 36-40, F

If you are mailing something you put it in the box and raise the flag. That way the mailman knows he has mail to pick up.

beermeplease · M

@lissah oh...i thought it was what i answered here....thanks for clearing that up 🤗

lissah · 36-40, F

@beermeplease lol i just read your answer. I think it's just a convenience for the postman.

zonavar68 · 56-60, M

@lissah ah right. Our postal system doesn't do that. Mail or small parcels have to be prepaid to be put into a street posting box if you can find one or taken to an actual post office or post office agency and postage paid at lodgement there.

lissah · 36-40, F

@zonavar68 well ours has to have postage in place too.