As a manager, you may think that professional courtesy doesnβt move the needle for your career. Youβre wrong. Selective customer service is now the norm. So infusing professional courtesy in your communications heightens your credibility and maturity, and earmarks you for advancement. In this article, Lucille Ossai, an international award-winning communications trainer, shares a real-life case study and provides practical ways to differentiate yourself with this powerful attribute.