Business communication and organizational structure are important criteria for successful business. Communication is used for conducting business, creating business collaboration and maintaining business relations and contacts. Knowledge of business communication is certainly one of indicators of successful business collaboration. Verbal communication is divided to oral and written communication and makes the first impression and leaves written trace. The first impression is the most important for spoken words cannot be erased but are remembered among business partners. All documents leave behind a written trail and have to contain all necessary elements because they are used as proof in making business. Nonverbal communication is the oldest form of communication which was used by humans throughout history. It is communication of body talk, facial expressions, tone of voice, posture and gestures. Knowledge of business communication and forming an adequate organizational structure within a company is the way to achieving business aims and success. The aim of researching business communication and organizational structure within Croatian Customs Administration, Department of Intrastat is to determine the existing business communications and organizational structure, and analyze possibilities of changing communication and organizational structures in order to improve business efficiency and employee satisfaction.