If there is a resident manager or a rental office at the apartment complex, an envelope without an apartment number in the address could be sent there instead. If this information is not on the envelope, it may be sent back to the sender.
If a letter is sent to an apartment complex without a number, the Postal Service tries to deliver it to a manager, owner, or rental office on site. If the manager knows who lives in the apartment, he or she can just put the letter in the tenant’s mailbox or look up the apartment number on a list of tenants. The worst thing that could happen is that the letter would be turned down and sent back to the sender’s address with the message “Undeliverable as Addressed.”
