Use the person’s preferred name and title
Match the level of formality to the setting
Use Mr., Ms., Mrs., Dr., or Prof. when appropriate
Use first names only if invited to do so
Use full names in formal written communication
Use last names with titles in professional settings
Use honorifics and cultural titles correctly
Ask how someone prefers to be addressed if unsure
Avoid assumptions about gender, marital status, or rank
Use respectful language in all correspondence