What should you do if you’re unsure how someone prefers to be introduced?

When you're uncertain about how someone prefers to be introduced, the best course of action is to ask them directly. This approach shows respect for the individual's preferences and acknowledges that introductions can vary based on personal or cultural contexts. By asking, you not only ensure that you are addressing them in a manner that they are comfortable with, but you also demonstrate consideration and attentiveness, traits that are essential in etiquette.

Using the most formal title might be appropriate in some situations, but it's not guaranteed to align with the individual’s personal preferences or comfort level. Guessing based on appearance can lead to assumptions that may be incorrect, potentially causing embarrassment or discomfort. A casual introduction could be seen as disrespectful or inappropriate, particularly in formal settings where a more respectful approach is expected. Therefore, directly inquiring about their preferred method of introduction is the most etiquette-friendly option.