Can an out going flag be added to this box?

Hello, you can add a flag, however, please note that altering the mailbox will void the warranty. All of the manufacturers post mount mailboxes are equipped with an outgoing mail flag.

It does not appear to be able to accept an outgoing mail flag. There are no pre-drilled holes or access areas to add an aftermarket flag. There is not a shelf or space to put outgoing mail so I suspect that is why it was not designed to accept an outgoing flag. I usually don't have any outgoing mail but if need arises I plan on leaving outgoing mail partially sticking out of spring loaded slot for mailman to take as I don't have mail theft concerns in my area. Also, I don't believe there is a universal key for this. If I see my mailman, I will ask & update.

No. There is a magnetic clip that adheres to the inside of the door for outgoing mail.