A professionally designed business card increases credibility and legitimacy for a business. In other words, it is the most effective way to show your company’s professionalism. In many countries or business meetings, it is customary to exchange business cards when you are meeting someone for the first time. So, it might seem quite unprofessional if you don’t have a proper business card and the other person does. Thus, a professional business card will help establish your legitimacy to your prospect or associate..