Confusion arises from vague terms, inconsistent communication or cultural differences. Prevention: 1) Be specific. Don't say 'elegant' but 'Business Formal: dark suit, tie'. 2) Give examples (photos or links help). 3) Repeat the message (invitation, reminders, website). 4) Have a contact person ready for questions. 5) Accept deviations. Not everyone can dress to the norm. For international groups: say what you expect without judging. For mixed ages or generations: Business Casual is usually safe. Live Impact communicates crystal clear in advance, so everyone arrives confident.