form of address
mode of address
manner of address

He had never before used this form of address to Sean.

There were only two verbal forms of address for the five people in the room.

Even in a formal business letter you should use a personal and human form of address.

Brother and Sister are common forms of address across all the communities.

But don't ask me to change my form of address.

I care much for jokes but not in the form of address.

The given name is the primary form of address for Vietnamese.

The form of address was wrong, but he recognized the voice.

This form of address is used in the motion picture, also.

Mistress is an old form of address for a woman.