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What is a P.O. Box or PMB?

Concierge avatar
Written by Concierge
Updated over a week ago

A P.O. Box (Post Office Box) is a locked mailbox located at a post office, used to receive mail securely. A PMB (Private Mailbox), on the other hand, is a mailbox service offered by private companies.

For verification and regulatory purposes, we can not accept a P.O. box or PMB as your legal address. This address must be a physical address in the United States.





Karat is a financial technology company and not a bank. Banking services provided by Grasshopper Bank, N.A., member FDIC.

Karat perks including offering APY rewards on deposits are offered by Karat. The advertised rates are effective as of 4/18/25 and are subject to change. See Deposit Account Agreement Disclosures (trykarat.com/deposit-account-agreement-disclosures) and Karat Premium Terms of Service (trykarat.com/karat-premium-terms-of-service) for details.

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