Deliver Address Listed as Insufficient Address or Address Unknown

Why does tracking say “Insufficient Address” or “Address Unknown”?
This usually means a mailbox has not been assigned to your address. USPS requires all delivery locations to have a designated mailbox. Without one, the address may be considered invalid—even if mail carriers occasionally hand-deliver items directly to your store.

How do I fix this?
Contact your local post office. They can assign a mailbox to your address and provide a key.