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ZIP Codes are required on Express Mail, commercial First-Class

Mail,

First-Class

Package Service, Periodicals, Standard Mail, Package Services and Parcel Select mailpieces,

all mail sent to military addresses within the United States and to APO and FPO addresses, official mail, Business Reply Mail, and merchandise return service mail.

Unless required above, ZIP Codes may be omitted from single-piece

price

First-Class

Mail (including Priority Mail), single-piece

price Standard Post, and pieces bearing a simplified address.

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11y ago
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Wiki User

14y ago

No; if it's a letter, you can just put it in your mailbox and flip the flag up. Then your mailman will deliver it.

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Wiki User

12y ago

Yes

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Q: Do you need to have a zip code to mail a letter?
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Will the po deliver mail without the state on the label - we have the zip?

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